Chemistry Manual 2012-2013 - Edison State College
Chemistry Manual 2012-2013 - Edison State College
Chemistry Manual 2012-2013 - Edison State College
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Blake Schmidt - Unit 9 Page 52<br />
U9 EP5<br />
Unit 9: Example Problems 5<br />
Solution Stoichiometry<br />
1.<br />
How many moles of lead(II) hydroxide (solid) can be formed when 0.0225L of<br />
0.135 M Pb(NO3)2 solution reacts with excess sodium hydroxide?<br />
2.<br />
Aqueous barium nitrate reacts with aqueous sodium sulfate. Abigail places 20.00 mL of 0.500 M<br />
barium nitrate in a flask. She has a 0.225M sodium sulfate solution available. What volume of<br />
this solution must she add to her flask of barium nitrate so she has no excess reactant left over?<br />
3.<br />
Calcium chloride (aq) reacts with sodium carbonate (aq). Determine what volume of a 2.00 M<br />
calcium chloride solution would be needed to exactly react with 0.0650 L of 1.50 M Na2CO3.<br />
How many grams of sodium chloride should be produced from the reaction. How much sodium<br />
chloride will actually be produced if the percent yield for the reaction is 85%?<br />
4.<br />
The remaining problems represent all types of stoichiometry problems<br />
Calculate the number of moles of potassium chlorate (s) that must decompose to produce<br />
potassium chloride (s) and 1.8 moles of oxygen.<br />
5.<br />
Magnesium metal reacts with hydrochloric acid. What volume of 1.0 M hydrochloric acid is<br />
needed to completely react with 2.43 g of magnesium?<br />
6.<br />
Ethane, C2H6, combusts in air. What mass of oxygen is needed to react with 2.20 mol of ethane?<br />
7.<br />
Determine the mass of sodium nitrate produced when 0.73 g of nickel(II) nitrate reacts with<br />
sodium hydroxide.<br />
8.<br />
2.93 g of copper metal is placed in a 0.75 M silver nitrate solution, producing silver metal and<br />
aqueous copper(II) nitrate. The silver nitrate solution contained 1.41 g of silver nitrate. What is<br />
the volume of the silver nitrate solution? If 0.87 g of silver metal is recovered, what is % yield?<br />
9.<br />
Hydrochloric acid is added to sodium bicarbonate, producing sodium chloride, water and carbon<br />
dioxide. What is the percent yield if 4.68 g of CO2 are collected when 10.0 g of sodium hydrogen<br />
carbonate reacts with excess 3.0 M HCl?<br />
10.<br />
If 5.0 g of phosphorus and 35 g of bromine react, how many grams of phosphorus tribromide<br />
should be produced?<br />
11.<br />
Zinc sulfide and oxygen gas react to form zinc oxide and sulfur dioxide. Determine the amount<br />
of ZnO that should be produced in a reaction between 46.5 g of ZnS and 13.3 g of oxygen. What<br />
is the mass of the xs reactant?
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