Complete the balanced equation for the precipitation reaction of magnesium chloride with sodium hydroxide by writing the correct number in front of NaOH.
MgCl2(aq)+.....NaOH(aq)→Mg(OH)2(s)+2NaCl(aq) \text{MgCl}_2\text{(aq)} + \text{.....NaOH(aq)} \rightarrow \text{Mg(OH)}_2\text{(s)} + 2\text{NaCl(aq)} MgCl2(aq)+.....NaOH(aq)→Mg(OH)2(s)+2NaCl(aq)230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.