TAKSTAKS

Warm-ups Warm-ups 33rdrd - 6 weeks chem - 6 weeks chem

TEKS 8BTEKS 8B

Analyze energy changes that accompany Analyze energy changes that accompany chemical reactions including but not chemical reactions including but not limited to those occurring in heat packs, limited to those occurring in heat packs, cold packs, and glow sticks to classify cold packs, and glow sticks to classify them as endergonic or exergonic them as endergonic or exergonic reactions.reactions.

GUIDING QUESTION: What GUIDING QUESTION: What are the sources of energy are the sources of energy changes in chemical changes in chemical reactions?reactions?

GUIDING GUIDING QUESTION:QUESTION:

What is the What is the effect of a effect of a catalyst on catalyst on the speed of the speed of chemical chemical reactions? reactions?

A substance thatA substance thatspeeds up a chemicalspeeds up a chemicalreaction without reaction without being permanentlybeing permanentlychanged itself is a(n)changed itself is a(n)_______._______.

a)a) coefficientcoefficientb)b) inhibitorinhibitorc)c) catalystcatalystd)d) reactantreactant

Substances that Substances that prevent, or slow prevent, or slow down, chemical down, chemical reactions are reactions are called:called:

a)a) endothermicsendothermicsb)b) catalystscatalystsc)c) productsproductsd)d) inhibitorsinhibitors

TEKS 8CTEKS 8C

Investigate and identify the Law of Investigate and identify the Law of Conservation of Mass.Conservation of Mass.

Guiding Question: How do you Guiding Question: How do you preserve the Law of Conservation preserve the Law of Conservation of Mass in a chemical equation? of Mass in a chemical equation?

Guiding Question: How do you Guiding Question: How do you identify the reactants and the identify the reactants and the products in a chemical reaction?products in a chemical reaction?

In a balanced equation, how In a balanced equation, how does the mass of the does the mass of the reactants compare to the reactants compare to the mass of the products?mass of the products?

a)a) mass of products is greatermass of products is greaterb)b) mass of reactants is mass of reactants is

greatergreaterc)c) they are equalthey are equal

What coefficient values will balance the What coefficient values will balance the reaction shown above?reaction shown above?

a)a)2,2,1 c)2,1,22,2,1 c)2,1,2

b)b)1,1,1 d)1,2,21,1,1 d)1,2,2

GUIDING QUESTION: What GUIDING QUESTION: What are the rules which govern are the rules which govern the balancing of the balancing of equations?equations?

__ CO(g) + __ O__ CO(g) + __ O22(g) __ CO(g) __ CO22(g)(g)

GUIDING QUESTION: Name the GUIDING QUESTION: Name the four general types of chemical four general types of chemical reactions.reactions.

TEKS 9ATEKS 9A

Relate the structure of water to its Relate the structure of water to its function as the universal solvent.function as the universal solvent.

GUIDING QUESTION: What are the GUIDING QUESTION: What are the three types of solutions?three types of solutions?

GUIDING QUESTION: How do solvents GUIDING QUESTION: How do solvents work?work?

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TEKS 9BTEKS 9B

Relate the concentration and dissociation Relate the concentration and dissociation of ions in a solution to physical and of ions in a solution to physical and chemical properties such as pH, chemical properties such as pH, electrolytic behavior, and reactivity.electrolytic behavior, and reactivity.

Guiding Guiding Question: Question: What type What type of of solutions solutions conduct conduct electricity?electricity?

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GUIDING GUIDING QUESTION: QUESTION: How is pH How is pH related to related to the the strength of strength of an acid or an acid or base?base?

Guiding questions: What are the Guiding questions: What are the characteristics of an acid, base or salt?characteristics of an acid, base or salt?

Guiding questions: What are the Guiding questions: What are the differences between saturated, differences between saturated, unsaturated and supersaturated unsaturated and supersaturated solutions?solutions?

a) unsaturated, b) saturated, c) supersaturateda) unsaturated, b) saturated, c) supersaturated

Pictured above is the ionization of a(n) Pictured above is the ionization of a(n) ___________ to form a(n) ________ ion.___________ to form a(n) ________ ion.

a)a)base, hydronium, b) acid, hydroxide ion, base, hydronium, b) acid, hydroxide ion, c) acid, hydroniumc) acid, hydronium

Guiding questions: What ions are formed Guiding questions: What ions are formed when an acid dissociates and when a base when an acid dissociates and when a base dissociates?dissociates?

Guiding questions: Why will salt water Guiding questions: Why will salt water conduct electricity but sugar solutions conduct electricity but sugar solutions will not?will not?

The water in the beaker will cause the light bulb to roduce light The water in the beaker will cause the light bulb to roduce light because:because:

a)a) The electrodes are emersed in an ionic solutionThe electrodes are emersed in an ionic solution

b)b) The ionic solution contains charged particles (ions)The ionic solution contains charged particles (ions)

c)c) The solution completes the circuitThe solution completes the circuit

d)d) All of the aboveAll of the above

TEKS 9DTEKS 9D

Demonstrate how various factors Demonstrate how various factors influence solubility including temperature, influence solubility including temperature, pressure, and nature of the solute and pressure, and nature of the solute and solvent.solvent.

GUIDING QUESTION : How does GUIDING QUESTION : How does temperature affect solubility?temperature affect solubility?

GUIDING QUESTION : What GUIDING QUESTION : What occurs during a occurs during a neutralization reaction?neutralization reaction?

TEKS 9ETEKS 9E

Demonstrate how factors including but Demonstrate how factors including but not limited to particle size influence the not limited to particle size influence the rate of dissolving.rate of dissolving.

Guiding Question: How can you Guiding Question: How can you determine the rate at which a determine the rate at which a solid dissolves?solid dissolves?