NAME
Kif-
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PERIOD:
HOMEWORK 9.2 STOICHIOMETRY
a. Review your notes.
b. Answer the following:
1. Citric acid, H3C6Hs07, is a product of the fermentation of sucrose, C]ZH220]] in air:
C]ZH220]]
(aq) + 302 (g)
->
2H3C6Hs07 (aq) + 3H20 (I)
Determine the mass (g) of citric acid produced when 2.50 moles of sucrose is used.
d. SO ••w.l
C,a. 1-1J3() "
I q;). I 43 /13 C,
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riel
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2. A solution of potassium chromate reacts with a solution of lead (II) nitrate to produce a yellow precipitate of lead
(II) chromate and a solution of potassium nitrate:
K2Cr04 (aq) + Pb(N03)2 (aq)
->
PbCr04 (5) + 2KN03 (aq)
Determine the mass (g) of PbCr04 produced when 0.250 moles K2Cr04 reacts.
3. One in a series of reactions that inflate air bags in automobiles is the decomposition of sodium azide, NaN3:
2NaN3 (s)
-+
2Na (s) + 3N2 (g)
Determine the mass (g) of N, produced if 100.Omoles of Nabl, decomposes.
4. In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid:
2S02 (g) + O2 (g) + H20 (I)
-+
2H2S04 (aq)
Determine the mass (g) of sulfuric acid formed when 2.50 moles of sulfur dioxide react.
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