TAKS Warm-ups 3 rd - 6 weeks chem

TEKS 8B  Analyze energy changes that accompany chemical reactions including but not limited to those occurring in heat packs, cold packs, and glow sticks to classify them as endergonic or exergonic reactions.

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

GUIDING QUESTION: What is the effect of a catalyst on the speed of chemical reactions? A substance that speeds up a chemical reaction without being permanently changed itself is a(n) _______. a) coefficient b) inhibitor c) catalyst d) reactant

Substances that prevent, or slow down, chemical reactions are called: a) endothermics b) catalysts c) products d) inhibitors

TEKS 8C  Investigate and identify the Law of Conservation of Mass.

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

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

In a balanced equation, how does the mass of the reactants compare to the mass of the products? a) mass of products is greater b) mass of reactants is greater c) they are equal

What coefficient values will balance the reaction shown above? a)2,2,1 c)2,1,2 b)1,1,1 d)1,2,2 GUIDING QUESTION: What are the rules which govern the balancing of equations? __ CO(g) + __ O 2 (g) __ CO 2 (g)

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

TEKS 9A  Relate the structure of water to its function as the universal solvent.

GUIDING QUESTION: What are the three types of solutions?

GUIDING QUESTION: How do solvents work?

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TEKS 9B  Relate the concentration and dissociation of ions in a solution to physical and chemical properties such as pH, electrolytic behavior, and reactivity.

Guiding Question: What type of solutions conduct electricity? bright

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

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

Guiding questions: What are the differences between saturated, unsaturated and supersaturated solutions? a) unsaturated, b) saturated, c) supersaturated

Pictured above is the ionization of a(n) ___________ to form a(n) ________ ion. a)base, hydronium, b) acid, hydroxide ion, c) acid, hydronium c) acid, hydronium Guiding questions: What ions are formed when an acid dissociates and when a base dissociates?

Guiding questions: Why will salt water conduct electricity but sugar solutions will not? The water in the beaker will cause the light bulb to roduce light because: a)The electrodes are emersed in an ionic solution b)The ionic solution contains charged particles (ions) c)The solution completes the circuit d)All of the above

TEKS 9D  Demonstrate how various factors influence solubility including temperature, pressure, and nature of the solute and solvent.

GUIDING QUESTION : How does temperature affect solubility?

GUIDING QUESTION : What occurs during a neutralization reaction?

TEKS 9E  Demonstrate how factors including but not limited to particle size influence the rate of dissolving.

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