Stoichiometric
1. A 2.119 g sample of potassium chlorate decomposes upon heating to form potassium chloride and 0.789 g oxygen. Determine the percent yield for oxygen.
2. A 4.000 g sample of impure lithium nitrate decomposes upon heating to produce 2.789 g lithium nitrite and oxygen. Determine the percent purity of the lithium nitrate.
3. A sample of sugar, C12H22O11, that is 91.25 % pure has a mass of 10.00 g. This sugar is reacted with oxygen. 3.50 mL water (recall density) is collected. Write this combustion reaction, balance and determine the percent yield for the water collected.
4. A solution containing 200.0 g of impure sodium chloride solution reacts with sufficient lead (II) nitrate solution and produces 450.1 g solid lead (II) chloride. What is the percent purity of the sodium chloride? Write this double replacement reaction and balance. Explain why the collected product is a solid.
