Calculate the mass of zinc hydroxide that reacts with 0.1 mol of sulfuric acid.

Zn (OH) 2 + H2SO4 = ZnSO4 + 2H2O.

From this reaction it follows that 1 mol of sulfuric acid reacts with 1 mol of zinc hydroxide. Therefore, 0.1 mol of acid will react with 0.1 mol of hydroxide. According to the formula:

m = n * Mr = 0.1 * 99 = 9.9 g

we find that the mass of zinc hydroxide is 9.9 g.

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