How many grams of water react completely with 5.0 g iron(III) chloride in the following reaction: iron(III) chloride + water → iron(III) hydroxide + hydrochloric acid

Question

How many grams of water react completely with 5.0 g iron(III) chloride in the following reaction: iron(III) chloride + water → iron(III) hydroxide + hydrochloric acid

Answer 1

FeCl₃ + 3H₂O ==> Fe(OH)₃ + 3HCl ... balanced equation

molar mass FeCl₃ = 162.2 g/mol

5.0 g FeCl₃ x 1 mol/162.2 g x 3 mol H₂O/mol FeCl₃ x 18 g H₂O/mol H₂O = 1.7 g H₂O (2 sig. figs.)