Writing chemical equations The metal, magnesium, is reacted with hydrochloric acid as shown in the word equation below magnesium + hydrochloric acid magnesium chloride + hydrogen 1. Write the balanced symbol equation with state symbols for this reaction (4 marks) 2. Complete the passage below which describes the reaction in terms of moles (4 marks) In this reaction, ___ mole of magnesium reacts with ___ moles of hydrochloric acid. This produces ___ ______ of magnesium chloride and __ ________ of hydrogen.