Calcium chloride 6-hydrate (CaCl₂H₁2O6) is a substance used to melt snow on streets and
sidewalks. It is made from calcium carbonate (CaCO3) using the following reaction:
CaCO, (s) + 2HCl (aq) + 5H₂0 (1)→ CaCl₂H₁2O6 (s) + CO₂ (g)
If 7.20 moles of HCI are added to excess CaCO, and excess water, how many moles of
calcium chloride 6-hydrate will be made?
