If 20.0 grams of magnesium react with excess hydrochloric acid, how many grams of magnesium chloride are produced? __________

Question

Mg + 2 HCl -------> MgCl2 + H2

(step by step would be appreciated)

Answer 1

You will need to convert grams of magnesium into grams of magnesium chloride using the balanced chemical equation and the molar masses of the two compounds. So 20 grams of magnesium is divided by the molar mass of magnesium and there is one mole of magnesium chloride produced for every one mole of magnesium. Multiplying this number by the molar mass of magnesium chloride you the grams of magnesium chloride produced.

20 g Mg x 1 mole Mg x 1 mole MgCl2 x 95.211 g MgCl2 = ? g MgCl2

24.305 g Mg 1 mole Mg 1 mole MgCl2