Exam III Review

Front

What is the formula to calculate percent yield?

Back

Percent Yield = (Actual Yield / Theoretical Yield) x 100%

Front

What is the theoretical yield if the actual yield is 62g and the percent yield is 85%?

Back

Theoretical Yield = Actual Yield / (Percent Yield / 100) = 62g / (85 / 100) = 73g

Front

Define exothermic reaction.

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat or light.

Front

Define endothermic reaction.

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings.

Front

What are spectator ions?

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged.

Front

In the reaction of sodium chloride with silver nitrate, which ions are the spectator ions?

Back

Sodium (Na+) and Nitrate (NO3-) are the spectator ions.

Front

What is chemical potential energy?

Back

Chemical potential energy is the stored energy in the chemical bonds of a substance.

Front

How do you calculate the amount of product formed in a reaction based on the concentration of reactants?

Back

Use stoichiometry based on the balanced chemical equation to relate the moles of reactants to the moles of products.

Front

What is the balanced equation for the combustion of ethanol (C2H6O)?

Back

C2H6O + 3 O2 → 2 CO2 + 3 H2O

Front

If you have 240 mL of a 1.3 M solution of C2H6O, how many mL of a 0.74 M solution of CO2 will be produced?

Back

843 mL of CO2 will be produced.