Question

1. A student determines the iron(II) content of a solution by first precipitating it as iron(II) hydroxide, and then decomposing the hydroxide to iron(II) oxide by heating. How many grams of iron(II) oxide should the student obtain if her solution contains 54.0 mL of 0.530 M iron(II) nitrate?

________ g

2. A 0.4999 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.6118 g.

What is the mass percentage of chlorine in the original compound? ________ %