template by bill arcuri, wcsd click once to begin jeopardy! chemistry final review

Template byBill Arcuri, WCSD

Click Once to BeginJEOPARDY!Chemistry Final Review


JEOPARDY!

100 100 100 100 100 100

200 200 200 200 200 200

300 300 300 300 300 300

400 400 400 400 400 400

500 500 500 500 500 500

Dissolving Concentration Solubility/ Precipitation

Parts of Solutions Acids and Bases Real Life Applications


What does dissolve in water mean?


Dissolve in water means that the ions of the compound break up when put in water


What is an electrolyte?


An electrolyte is a compound that dissolves in water


What are unsaturated, saturated, and supersaturated solutions?


Unsaturated means that more solute can be added, saturated

means that a solution has dissolved all the solute it can hold, supersaturated means

that due to an increase in heat a solution has more solute

dissolved than it can normally hold.


Break up (NH4)3PO4 into ions


3NH4+ + PO4

3-


What is the formula for vinegar and what kind of electrolyte is it?

Why?


The formula is HCH3COO and it is a weak electrolyte because the not many H+ ions

dissociate.


If you 2.5 moles of Na+ is dissolved in 5 L of water, what

is the molarity?


.5 M Na+


What is the molarity of Cl- in 1.2 M CaCl2?


2.4 M Cl-


Find the %(W/V) for 60 g of solute in .6 L of a solution


10%(W/V) Don’t forget to convert to milliliters for %

(W/V)


Find the molarity of 5.6 g of lead nitrate in 400 mL water


5.6 g x (l mol/331.2 g/mol) = .0169 mol.

.0169 mol/.4 L = .0423 M


Daily Double!!!What is the total ion molarity for 6.7 g of

Ammonium Sulfide in 5 L of water?


6.7 g x (1 mol Ammonium Sulfide/68.154 g/mol) = .0983 mol

.0983 mol x 3 ions = .295 mol


What is a solute?


A solute is the chemical that is dissolved


If 11 moles of NaCl are dissolved in 330 kg of water,

what is its molality?


.033 m


When magnesium chloride is placed into water, it seems to disappear. Does it disappear? If not, why does it seem this

way?


Magnesium chloride does not disappear when put in water, the particles are just surrounded by water and

too tiny to see.


What is hydration and ionization?


Hydration is what occurs when an ionic compound

dissolves in water, ionization is the process

of breaking up the compound into separate

ions.


What kind of electrolytes conduct electricity well? Why?


Strong electrolytes conducted electricity better because they make free-

floating ions in water.


What is a precipitate?


A precipitate is an insoluble compound that does not

dissolve in water


If silver nitrate was mixed with sodium chloride, would a

precipitate form?


Yes, AgCl would precipitate


Indicate what precipitates forms, if any:

NaNO3 + Li2CO3


No precipitate forms


Indicate what precipitates forms, if any:Ca(CH3COO)2 + Na3PO4


Ca3(PO4)2 would form


Indicate what precipitates forms, if any:

Magnesium iodide and mercury (I) flouride


Hg2I2 and MgF2 would form


What is the difference between pH and pOH?


pH is a measure of the H+ concentration

and pOH is a measure of the OH-

concentration


If there are .006 mol of H+ in 2 L of water, what is the H+

concentration?


.006 mol/2 L = .003 M H+


If the pH increase by 2, what happens to the H+

concentration?


It decreases by 100


What is the H+ concentration if the pOH is 8.6?


14 – 8.6 = 5.4pH = 5.4

10-5.4 = 3.98 x 10-6


If .05 moles of HCl are put in 60 L of water, what is the pH?

Daily Double!!!


.05 moles / 60 L = -8.33 x 10-4 M

10(-8.33 x 10-4) = 3.08


What are real life uses for an acid and a base?


Acid: Batteries, fertilizers, soaps,

shampoo, detergents

Base: Drain cleaner, laxatives, antacids


How could the sweetness of lemonade be maximized in

accordance with saturation?


Super saturation of the lemonade with sugar


What effects from acid rain suggest that it is acidic?


Corrosion of metal/stone, lower the pH of water bodies, damage to nature via resource ruination


Name one important food and the electrolyte in it


Banana (K+), Salty foods (Na+/Cl-), Milk (Ca2+), Leafy

Greens (Mg2+)


If you frequently have heartburn , would putting ketchup on your French fries increase or

decrease the odds of you getting heartburn? Why?


It would increase your odds of getting

heartburn because ketchup has vinegar (acetic acid), which is

acidic.


Final Jeopardy

If .5 mol H2SO4 dissolved in 30 L of water is added to 2 mol HCl dissolved in 10 L of water, what is the pOH?


Click Once to Begin

.5 mol / 40 L = .0125 M x 2 H+

= .025 M H+ in H2SO4

2 mol / 40 L = .5 M H+ in HCl.

.025 M H+ in H2SO4 + .05 M H+ in HCl = .075 M H+ total.

-log(.075 M) = 1.1214 – 1.12 = 12.87

pOH = 12.87

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