Part B: Question 4
Directions:No Calculators may be used with Part B. Write the formulas to show the reactants
and the products for any FIVE of the laboratory situations described below. Answers to more
than five choices will not be graded. In all cases a reaction occurs. Assume that solutions are
aqueous unless otherwise indicated. Represent substances in solution as ions if the substances
are extensively ionized. Omit formulas for any ions or molecules that are unchanged by the
reaction. You need not balance the equations. The Section II score weighting for this question
is 15%.
- Example:A strip of magnesium is added to a solution of silver nitrate.
Mg + Ag+âMg2++ Ag(a) A piece of solid tin is heated in the presence of chlorine gas.
(b) Ethane is burned completely in air.
(c) Solid copper shavings are added to a hot, dilute nitric acid solution.
(d) Dilute sulfuric acid is added to a solution of mercuric nitrate.
(e) Sulfur trioxide gas is heated in the presence of solid calcium oxide.
(f) Copper sulfate pentahydrate is strongly heated.
(g) A strong ammonia solution is added to a suspension of zinc hydroxide.
(h) Ethane gas is heated in the presence of bromine gas to yield a monobrominated product.Part IV: AP Chemistry Practice Test