water test c/d - fort thomas independent · web viewaccording to the procedure in the...

Chemistry I Semester Exam 2008* Place all answers on the exam.DO NOT WRITE ON THIS EXAM

1.

You are given 100 grams of a 75% sugar solution by mass. This solution containsA)

100 grams of sugar and 75 grams of water

B) 75 grams of sugar and 25 grams of water

C) 75 grams of sugar and 75 grams of water

D)

25 grams of sugar and 75 grams of water

2.

The shape of the water molecule is best described asA)

bent or v-shaped

B) pyramidalC) linearD)

crystal lattice

3.

The most common solvent on Earth is

A)

carbon tetrachloride

B) alcoholC) benzeneD)

water

4.

Which term describes the carbon dioxide that is dissolved in a carbonated beverage?A)

solute

B) solutionC) solventD)

precipitate

5.

Generally, for solids dissolving in liquids, how does an increase in temperature affect the solubility of a solid?A)

does not affect solubility

B) decreases solubilityC) increases solubility

7. Which statement about water is false?A) Water molecules strongly attract

each other.B) The oxygen end of water has a

negative charge.C) Water has low surface tension.D) Water is a bent molecule.

8. The results for a chloride ion test on A sample of Ohio River water is(no color or precipitate). This means thatA) not enough reference solution was usedB) no ion is present or a very small

amount of the ion may be presentC) the ion is definitely presentD) the water is pure

6.

An electric company removes water from a river in order to use it in its electric power plant. The water leaving the power plant would beA)

warmer and have a lower oxygen concentration

B) cooler and have a higher oxygen concentration

C) warmer and have a higher oxygen concentration

D)

cooler and have a lower oxygen concentration

7.

A molecule that has bonds with unequal sharing of electrons is aA)

metallic molecule

B) polar moleculeC) nonpolar moleculeD)

nuclear molecule

8.

A person's home has lead-containing solder in the joints in the copper water pipes. In which case is the person likely to be exposed to the most lead ion in the drinking water?A)

Cold basic water is sent through the pipes.

B) Hot acidic water is sent through the pipes.

C) Hot basic water is sent through the pipes.

D)

Cold acidic water is sent through the pipes.

9.

To calculate percent concentration of a solution, divide the mass of theA)

solute by the mass of the solvent

B) solute by the mass of the solutionC) solvent by the mass of the solutionD)

solvent by the mass of the solute

10.

What type of chemical bond is found in substances where a positive particle is attracted to a negative particle? A)

ionic bond

B) hydrogen bondC) nonpolar covalent bondD)

polar covalent bonds

11.

For gases dissolving in liquids, how does an increase in temperature affect the solubility of a gas?A)

increases solubility

B) does not affect solubilityC) decreases solubility

Use the following to answer questions 12-14:

12.

Which substance has the lowest solubility at 0°C?

A)

NaCl

B) KNO3

C) KCl

13.

What is the mass of KCl needed to make a saturated solution in 100 grams of water at 50°C?A)

50 g

B) 42 gC) 82 gD)

33 g

1. When an atom of sodium loses an electron, it becomes aA) positive ionB) negative ionC) positronD) neutron

2. Which pair forms a homogeneous mixture?A) sand and waterB) sugar and waterC) oil and waterD) oil and vinegar

3. Which of the following is a correctatom inventory for Silver Nitrate.(you must write the correct formula)

A) one silver, one nitrogenB) one silver, one nitrogen, one

oxygenC) one silver, one nitrogen, two

oxygensD) one silver, one nitrogen, three

oxygens

4. Which particle diagram best represents a mixture of one element and one compound?A)

B)

C)

5. Suspensions, colloids, and solutions are types ofA) elementsB) compoundsC) mixturesD) substances

6. What two measurements of a substance make up the substance's density value?A) mass and weightB) volume and pressureC) mass and volumeD) temperature and mass

9. A student claims that she has a bottle of completely "Pure" water. If that is the case, thenA) the water may have dissolved ions

and will have the tyndall effect.B) the water may have dissolved

ions but will not have the tyndall effect.

C) the water will not have anything dissolved in it and will not have the tyndall effect.

10. Which substance is an example of a compound?A) NO(g)B) Ni(s)C) Na(s)D) Ne(g)

11. Ice is less dense than water. A) Ice will sink in water B) Ice will float in water

12. A graduated cylinder was placed on a balance and themass recorded. Alcohol was placed in the the cylinderand the new mass recorded. The picture below shows the volume of the liquid in the cylinder. Calculate theliquids density.

Mass of graduated cylinder = 12.45gMass of g.c. and alcohol = 35.76gMass of alcohol = __________

A) 23.31 g/mLB) .728 g/mLC)D)

1.37 g/mL8.69 g/mL

13. Which of the following is the most accurateinterpretation for the chemical equation: 2H2 + O2 2H2OA) Two hydrogens react with two

oxygens to make waterB) Two hydrogen molecules react with

two oxygen molecules to produce two water molecules

C) Two hydrogen atoms react with on oxygen atom to form two water molecules.

D) Two hydrogen molecules react with one oxygen molecule to produce two water molecules.

14. Which common material is a solution?A) pure waterB) a bottled lemon-lime drinkC) italian salad dressingD) fresh bacon fat

15. The label on a solid tomato fertilizer says “ammonium phosphate, ammonium sulfate, muriate of potash, sulfate of potash, sulfate of potash-magnesia, manganese oxide, iron oxide.” The fertilizer is aA) solutionB) compoundC) mixtureD) pure substance

16. What causes a bottle of soda to burst when placed in a freezer overnight?A) The water in the soda contracts

when it freezes.B) The water in the soda expands

when it freezes.C) The bottle contracts when it

freezes.D) The bottle expands when it

freezes.

17. Which process is the best way to remove the color and odor from water?A) Filter the water sample through

sand and gravel.B) Add charcoal and filter the water

Sample using a funnel and filter paper.

C) Distill the water sample using a condenser and flask.

D) Add a test solution to the water such as Na2CO3

18. Which comparison is correct concerning the percent of water used across the United States?A) The east uses a greater percentage

For irrigation than the midwestB) More water is used for electric than

for agriculture in the whole United States (Nation)

C) The South, East and the Midwest alluse more water for Steam/electric than any other purpose.

D) Alaska and Hawaii both use no water for miningPurposes.

19.

In the above picture our dog "Lucky" is getting a bath. Which of the following statements is true regarding how water is used in the pictureA) It is an indirect use, but something

we could do without given a water shortage.

B) It is an indirect use of water, but a necessary use of daily water.

C) It is a direct use of water and not necessary in a water shortage situation

D) It is a direct use of water and should be done everyday regardless of the water supply onhand

20. The mayor must decide the amount ofwater to have sent to Riverwood during the three day water shortage. Which of the following factors shouldnot be included?A) The number of lawns needing

waterB) The population of the townC) The amount of drinking water

needed each day per personD) The amount of water needed for

personal hygiene for the 3 days (washing face, teeth, etc.)

21. Which symbol does not represent an ion?A) NaB) Ca+

C) Cl–

D) H+

22. Which statement correctly describes the type and number of atoms represented by the formula Ca(OH)2?A) 1 calcium, 1 oxygen, 2 hydrogenB) 1 calcium, 2 oxygens, 2 hydrogensC) 2 calciums, 2 oxygens, 2 hydrogensD) 1 calcium 1 oxygen, 1 hydrogen

23. Why is distillation not used to purify most tap water?A) Distillation is too expensive.B) Distillation does not remove all

impurities.C) Distillation eventually alters the

molecular structure of the water.D) Distillation gives off radioactive

waste products.

24. Which plan would be the most effective way for a family to conservewater?A) Everyone should reduce shower

time in half.B) Family members should drink

soda instead of water.C) Family members should eat fruits

to lessen the need of water.D) Water the house plants half as

much.

25. When an atom transfers an electron to another atom,A) the atom that loses the electron

becomes neutralB) the atom that gains the electron

becomes a positive ionC) the atom that loses the electron

becomes a positive ionD) the two atoms repel each other

26. When numerical data is gathered from a lab activity, analysis of the data can help lead to conclusions from the activity. The average of all the data is also known as theA) meanB) modeC) median

27.

HHS chemistry students were asked to explain why raisins "dance" when placed in sprite. Which of the following is the most correct explanationfor why raisins "rise" to the top and then "sink" to the bottom.A)

"The carbonation of the sprite moves the raisins up with the carbination. When the raisins get close to surface, oxygen gets in the cracks making it go back down."

B) "The raisins or the bubbles have a neg. or pos. charge. the opposite charges attract and link on to each other. There are so many bubbles on the raisins that slowly begin to rise making the raisins less densethan the sprite."

C) "Because the liquid is carbonated the gas in the liquid will cling to the raisins and when enough cling it causes the raisin to float until it reaches the surface then it sinks back down."

D)

"The carbon, fizz and bubbles push the raisins up and then the raisins drop because they have no forcepushing them."

28.

Which two terms for types of matter both identify substances?A)

elements and compounds

B) compounds and solutionsC) mixtures and compoundsD)

nonmetals and mixtures

29. When particles with the same charge move closer to each other, the particles willA) attractB) repelC) bondD) combine

___ 1. Pennies made after the year 1982 have the highest content of which element?

A) zincB) copperC) leadD) aluminumE) iron

___ 2. By using results from tests like the “Metal Reactivities” lab, the metal elements can be ranked in order of their chemical reactivity. This ranking is called the

A) data tableB) periodic tableC) density seriesD) activity series

___ 3. Which equation correctly represents the oxidation of calcium to calcium ion?

A) Ca2+ + 2e– → CaB) 2Ca2+ + 2e– → Ca4+

C) Ca → 2Ca+ + 2e–

D) Ca → Ca2+ + 2e–

___ 4. Which person developed the periodic table based on the properties of the elements?

A) John DaltonB) Dimitri MendeleevC) Fritz HaberD) Niels Bohr

___ 5. What is the total number of molecules in one mole of nitrogen, N2?

A) 6.02 1023

B) 1.50 1022

C) 1.20 1024

D) 3.01 1023

___ 6. The chemical formula for baking soda is NaHCO3. The subscript “3” in this formula means three

A) molecules of baking sodaB) atoms of oxygenC) atoms of carbonD) molecules of carbon dioxide

___ 7. Mendeleev's table of the elements was organized by

A) relative atomic massesB) each element's capacity to combine

with carbonC) atomic numbersD) the elements' phases—solid, liquid, or

gas

___ 8. Which of these is a physical change?

A) evaporationB) oxidationC) combustionD) substitution

___ 9. Which symbol represents a metalloid?

A) SiB) BrC) NaD) AlE) Kr

___ 10. Which part of our planet is the major “supply house” of the raw materials for manufactured goods?

A) hydrosphereB) thermosphereC) lithosphereD) atmosphere

___ 11. Given the unbalanced equation: __ Al4C3 + __ H2O __ CH4 + __ Al(OH)3

Which list gives the correct coefficients to balance the equation?

A) 1, 12, 3, 4B) 3, 12, 1, 4C) 2, 6, 3, 4D) 12, 1, 4, 3

___ 12. Calculate the molar mass of the compound Ca3(PO4)2. Show your work.

___ 13. The modern periodic law classifies elements according to:

A) boiling pointsB) melting pointsC) atomic massesD) atomic numbers

___ 14. Given the ionic equation: Mg + Cu2+ Cu + Mg2+

Which particle is reduced?

A) Cu2+ ionB) Cu atomC) Mg2+ ionD) Mg atom

___ 15. Which symbol represents a nonmetal?

A) FeB) WC) BrD) KE) Hg

___ 16. How many atoms of oxygen are shown in the formula Al2(SO4)3?

A) 1B) 12C) 7D) 4

___ 17. Which of these zinc compounds has thehighest percent by mass of zinc?

A) ZnCO3

B) ZnCl2

C) ZnSO4

___ 18. Which property is characteristic of anonmetal?

A) high densityB) good conductor of heatC) brittleD) malleable

___ 19. Chemical equations are balanced with numbers called

A) symbolsB) coefficientsC) subscriptsD) exponents

___ 20. Which choice is a renewable resource?

A) metalsB) woodC) coalD) oil

___ 21. Substances that exist before a chemical reaction takes place are called

A) the electronsB) the productsC) an equationD) the reactants

___ 22. Which two quantities contain the same number of atoms?

A) 2 mole NaCl and 1 mole CaClB) 1 mole NO2 and 1 mole of HC) 2 mole NH3 and 2 moles of HID) 1 mole Zn and 2 moles of H

Use the following to answer question 23:

Use the following equation to respond to the question(s) below:

5Na2C2O4 + 2KMnO4 + 8H2SO4 K2SO4 + 2MnSO4 + 5Na2SO4 + 10CO2 + 8H2O

___ 23. The atom count for oxygen on thereactant side is

A) 60B) 56C) 12D) 20E) 15

___ 24. Properties such as melting point, density, and electrical conductivity are examples of

A) nuclear propertiesB) physical propertiesC) chemical properties

___ 25. Which of these is an example of an alloy?

A) nylonB) woodC) glassD) brass

___ 26. How many moles of sulfur are present in a 16-g sample of sulfur?

A) 0.50 molB) 2.0 molC) 32 molD) 0.25 mol

___ 27. When an ion of copper in the ore chalcocite gains electrons, the Cu2+ ion is

A) fusedB) reducedC) ionizedD) oxidized

___ 28. A metal is usually obtained from its ore by a process called

A) castingB) oxidationC) reductionD) melting

___ 29. Which of these elements is most similar chemically to phosphorus?

A) NB) SiC) SD) C

___ 30. Horizontal rows of elements in theperiodic table are called

A) periodsB) octavesC) triadsD) families

___ 31. Given the balanced equation for thereaction producing ammonia: N2 + 3H2 2NH3 How many moles of N2 are needed to Produce 6 moles of NH3?

A) 2B) 3C) 6D) 9

___ 32. How many moles of hydrogen atoms are in 4 moles of H2O?

A) 12B) 4C) 8D) 2

___ 33. Which metal will reduce copper ions to copper metal from an aqueous copper nitrate solution?

A) silverB) zincC) copperD) gold

___ 34. In the periodic table, the most active metals are found

A) directly to the left of the steplike lineB) at the far left sideC) directly to the right of the steplike lineD) at the far right side

___ 35. In chemical reactions, “matter is neither destroyed or made” is a statement of the

A) law of mass actionB) law of conservation of energyC) law of action and reactionD) law of conservation of matterE) law of molar masses

___ 36. On the periodic table, the halogens arefound in

A) period 3B) period 4C) group 17D) group 13

___ 37. The mass number of an atom of an isotope is equal to the sum of the

A) protons and electronsB) neutrons, electrons, and protonsC) protons and neutronsD) neutrons, electrons, and positrons

___ 38. Which of these observations is evidence of a chemical change?

A) Rubbing alcohol evaporates from a surface.

B) A pop can is crushed by a hammer.

C) Bubbles of a gas explode whenignited.

D) A drink mix dissolves in water.

___ 39. Using redox reactions that occur in aqueous solutions in order to refinemetal ions to metal atoms is called

A) pyrometallurgyB) isometallurgyC) electrometallurgyD) hydrometallurgy

___ 40. The boiling point of HCl is –85°C while the boiling point of HI is –36°C.Estimate the boiling point of HBr, in °C.

A) –41°CB) –61°CC) –74°CD) –56°CE) –51°C

___ 41. What is the total number of neutrons in an atom with a massnumber of 27 and an atomic number of 13?

A) 14B) 40C) 13D) 27

___ 42. Vertical columns of elements in the periodic table are called:

A) triadsB) octavesC) groupsD) periods

___ 43. If a resource is renewable it means that the resource can be

A) replaced by nature in a short period oftime

B) decomposed by nature over a long period of time

C) reused without any changesD) recycled into a new product

Use the following to answer questions 44-47:

Identify the given resource asA) renewableB) nonrenewableC) not a resource

___ 44. Atmospheric oxygen

___ 45. Zinc

___ 46. Drinking water

___ 47. Gasoline

___ 48. The type of discarded waste that makes up the greatest amount of space in landfills is

A) glassB) paperC) plasticD) metal

___ 49. Given the unbalanced equation: ___ Al + ___ H2SO4 ___ H2 + ___ Al2(SO

Which list gives the correct coefficients to balance the equation?

A) 4, 2, 3, 1B) 2, 3, 3, 1C) 4, 3, 1, 3D) 1, 3, 3, 2

___ 50. Which particles are lost by an atom of zinc when it is oxidized?

A) protonsB) electronsC) neutrons

Short Answer: Write in Complete sentencesWhat are the physical and chemical properties of metals that make them a good choice for coins? (give at least 3)

Activity Series of Metals[most active]LiRbKCsBaSrCaNaMgAlTiMnZnCrFeCoNiSnPb*H2*CuAgAu[least active based on the hydrogen standard]

30. The best source of water for a home in a rural location that is far from lakesor rivers isA) the oceanB) groundwaterC) ice capsD) clouds

31. Ninety-seven percent of the Earth's supply of water is in the oceans. Which of these is the second largest supply of the Earth's water?A) cloudsB) groundwaterC) lakes and riversD) icecaps and glaciers

32. Compared to the density of water at 4°C, the density of water at 80°C isA) lessB) greaterC)D)

the samegone

33. Which phrase best describes diatomic molecules?A) molecules with one atom onlyB) molecules with one atom and one

ionC) molecules with two atoms of the

same elementD) molecules with two different

element's atoms

34. Which ion is shown with its correct charge?A) Ca2+

B) K-

C) NºD) He3+

35. Which formula is correct for the ionic compound formed from combining magnesium ions and chloride ions?A) MgClB) MgCl2

C) Mg2ClD) Mg2Cl2

36. How many protons are in the nucleusof an atom of sodium?A) 11B) 12C) 23D) 32

37. What is the sequence of numbered processes used to purify water according to the procedure in the “Foul Water” laboratory activity? 1. charcoal adsorption 2. gravel/sand/gravel filtration 3. distillation 4. oil-water separationA) 1, 2, 3, 4B) 4, 2, 1, 3C) 2, 4, 1, 3D) 3, 1, 4, 2

38.

Which two of the three basic subatomic particles are found in the atom's nucleus?A)

electrons and neutrons

B) neutrons and protonsC) protons and electrons

39. The “shorthand” used to represent anelement with one or two letters is calledA) an equationB) a formulaC) a symbolD) an edition

40. A student is given a 50.0-mL sample of water to purify in the Foul Water lab activity. After the purification process, the purified water measured 13.0 milliliters. Determine the percent water lost during this procedure.A) 11.8%B) 26.0%C) 74.0%D) 92.4%

14.

At what temperature will 130 g of KNO3 dissolve in 100 grams of water to produce a saturated solution?A)

27°C

B) 72°CC) 90°CD)

68°C

15.

Heavy metal ions bind to ___________ and affect the _____, _____, _____ systems.A)

carbohydrates; reproductive, nervous, and muscle

B) DNA; reproductive, liver, and kidney

C) proteins; respiratory, digestive, and reproductive

D)

proteins; kidney, liver, and nervous

16.

A pond is contaminated with a chemical that is a base. Which ion will be present in higher concentration than in uncontaminated water?A)

SO42–

B) Ba2+

C) H+

D)

OH–

Use the graph in #19 for #17.

17.

If 8 milligrams of oxygen is dissolved in 1000 grams of water at 12°C, the solution isA)

Unsaturated

B) SupersaturatedC) Saturated

18.

Vinegar contains a water solution of acetic acid. The most likely pH of vinegar isA)

7

B) 3C) 13D)

–1

19.

Water at 30°C is saturated with oxygen. The temperature of the water is cooled to 5°C. How much more oxygen must be dissolved in 1000 grams of water to keep it saturated?A)

20 mg

B) 12 mgC) 6 mgD)

1 mg

20.

Water dissolves ionic compounds very well. Which statement best describes how this happens?A)

The (-) oxygen end of water is attracted to the cation while the (+) hydrogen end is attracted to the anion.

B) Nonpolar bonds are made between water and ionic compounds.

C) The nonpolar ends of water attract the polar ionic compounds.

D)

Ionic compounds break water molecules into hydrogen and hydroxide.

21.

A solution that contains more solute than the indicated on the solubility graph for a certain temperature isA)

diluted

B) saturatedC) unsaturatedD)

supersaturated

22.

Which list of steps is in the correct order for municipal water treatment?A)

screening, prechlorination, flocculation, settling, filtration, postchlorination, fluoridation, and discharge

B) screening and sand removal, primary settling, aeration, secondary settling, chlorination, and discharge

C) primary settling, screening and sand removal, secondary settling, aeration, chlorination, and discharge

D)

primary settling, aeration, screening and sand removal, secondary settling, chlorination, and discharge

23.

Hard water is caused by all of the following ions exceptA)

magnesium

B) ironC) sodiumD)

calcium

24.

Some municipalities add a soluble fluoride compound to their drinking-water supply toA)

reduce tooth decay by strengthening tooth enamel

B) reduce the need to brush teeth to remove bacteria

C) eliminate iron ions from the waterD)

eliminate the bacteria found in water

25.

The purpose of adding chlorine to water during water treatment is toA)

soften the water

B) kill bacteriaC) reduce the pHD)

remove hardwater ions

26.

The water treatment process that removes objects larger than soda pop cans is calledA)

flocculation

B) screeningC) settlingD)

chlorination

27.

Water can be purified through different natural processes. Which process does not help purify water?A)

bacterial action

B) filtrationC) photosynthesisD)

evaporation

28.

Ninety-seven percent of the Earth's supply of water is in the oceans. Which of these is the second largest supply of the Earth's water?A)

groundwater

B) icecaps and glaciersC) cloudsD)

lakes and rivers

29.

Starting with what happens to water on the surface of a lake, which list is the correct order of steps in the hydrologic cycle?A)

precipitation, condensation, evaporation

B) condensation, evaporation, precipitation

C) evaporation, condensation, precipitation

D)

evaporation, precipitation, condensation

30.

Which type of water use is drinking a sports drink?A)

indirect use

B) direct use

31.

What causes a bottle of soda to burst when placed in a freezer overnight?A)

The bottle contracts when it freezes.

B) The water in the soda contracts when it freezes.

C) The bottle expands when it freezes.D)

The water in the soda expands when it freezes.

32.

A particle made from two or more nonmetals bonded together is calledA)

a mixture

B) a moleculeC) a compoundD)

an element

33.

If an atom loses an electron, it becomes aA)

positron

B) neutronC) negative ionD)

positive ion

34.

A solution is one type of

A)

suspension

B) mixtureC) compoundD)

element

35.

The ion-exchange resin in a water softener willA)

put air into the water

B) remove chlorine from the waterC) kill bacteria in the waterD)

replace magnesium with sodium ions

36.

When a result in an ion test is negative (no color or precipitate) for a water sample, this means thatA)

the test produced a solution but not a colloid

B) the test results produced a suspension

C) no ion is present or a very small amount of the ion may be present

D)

not enough reference solution was used

37.

The label on a solid tomato fertilizer says “ammonium phosphate, ammonium sulfate, muriate of potash, sulfate of potash, sulfate of potash-magnesia, manganese oxide, iron oxide.” The fertilizer is aA)

pure substance

B) mixtureC) solutionD)

compound

38.

Which of these is an element?

A)

nitrogen

B) waterC) ammoniaD)

air

39.

The smallest unit of an element is

A)

a molecule

B) a protonC) an atomD)

an electron

40.

In testing water for ions, a reference solution is used toA)

show what happens when the ion is not present in the test

B) check to see if the control has ions in it

C) show what happens when the ion is present in the test

D)

make sure the unknown sample contains the ion that is being tested

41.

Substances in a chemical reaction that exist before the reaction takes place are called theA)

products

B) protonsC) electronsD)

reactants

42.

Which of the following is not an essential metal?A)

iron

B) potassiumC) calciumD)

mercury

43.

Lead was used in all of the following escept A)

gas pipes

B) gasolineC) street lamps and light bulbsD)

paints

44.

Bubble gum dissolves very well in lighter fluid but it does not dissolve in water. Bubble gum is most likelyA)

a heavy metal

B) nonpolar molecularC) ionicD)

polar molecular

45.

When the flow of a river is fast, the dissolved oxygen levels can become elevated for several days. The problem for fish then may be:A)

flocculation

B) gas bubble traumaC) suffocationD)

problems with fish egg development

46.

17g of sucrose is dissolved in 183g of water. What is the percent concentration of sucrose?A)

9.3%

B) 17%C) 10.7%D)

8.5%

47.

Two students, Jim and Zach, test the solubility of potassium chloride in 100mL of water at three different temperatures by adding the solute little by little and stirring. A point was reached at each temperature where no more solute was able to dissolve. The amount of solute was recorded. Which of the following statements is not accurate.A)

Data collected for this experiment would be grams of solute that dissolved in 100mL of water

B) The amount of water and stirring should be controlled during the experiment

C) The experiment is more valid when it is completed several times and an average amount is calculated at each temperature.

D)

The variable for this experiment was the amount of water

48.

Which of the following is the correct formula for aluminum hydroxide?A)

AlH2O

B) Al(OH)3

C) AlOHD)

AlH

49.

According to the EPA, the acceptable pH range for drinking water is:A)

6.5-9

B) 6.5-8.5C) 6-8.5D)

5-9

50.

Which of the following is the correct name for the following ionic compound Ba(NO3)2

A)

barium nitrite

B) barium nitrateC) barium nitrogen oxideD)

barium nitroxide

Bonus (5pts.) Explain the “Chemistry” in the Cartoon. Write your answer on this test.

Answer Key

1. C2. A3. D4. A5. C6. A7. B8. B9. A10. A11. C12. B13. B14. D15. D16. D17. A18. B19. C20. A21. D22. E23. C24. A25. B26. B27. C28. B29. C30. A31. D32. B

33. D34. B35. D36. C37. B38. A39. C40. C41. D42. D43. C44. B45. B46. D47. C48. B49. B50. B

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