Question

Calcium reacts with hydrochloric acid,HCI, to make calcium chloride and hydrogen gas (H2).

1) write a word equation for this reaction.

2) write a balanced symbol equation for this reaction.

3) if 2g of calcium reacts completely with hydrochloric acid, what mass of calcium chloride is made?

Answer 1

1.)calcium+hydrochloric acid -->calcium chloride +hydrogen

2.)Ca + 2HCl -->CaCl2 + H2

3.)3.55g

Step-by-step explanation:

1.) pretty self explanatory

2.)Ca + HCl -->CaCl2 + H2

then balance

Ca + 2HCl -->CaCl2 + H2 (+2 infront of Hcl)

3.) take calcium and calcium chloride

Ca + CaCl2

then you need the relative atomic mass of both

Ca=40

CaCl2=71 (40+(35.5x2))

Ca=40 40/40=1 1x2=2g

Then repeat that exact equation for calcium chloride

CaCl2=71 71/40=1.775 1.775x3=3.55g