Question

How many grams of MgCl2 would you get if you started with 5.0 grams of Mg(OH)2

Answer 1

According to the Chemical equation:

`Mg(OH)_2\text{ + 2HCl =}\Longrightarrow MgCl_2+2H_2O`

Which means that for one mol of Mg(OH)2 consumed, one mol MgCl2 is produced. when we change mols to mass ussing the molar mass of the components this means that for every 58.3197 g of Mg(OH)2 consumed 95.211 g of MgCl2 is produced. But instead of 58.3197 grams we start with 5.0 g of Mg(OH)2. then we need to make the following calculation:

`5.0gofMg(OH)_2\text{ x }(95.211gofMgCl_2)/(58.3197gofMg(OH)_2)=8.16gofMgCl_2`