General Chemistry 4th Edition University Science Books presented by Sapling Lear

Question

General Chemistry 4th Edition University Science Books presented by Sapling Learning MapA When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon produced dioxide, and water are Caco,(s) + 2HCI(aq) CaCl2(aq) +H2O(1) + CO2(g) How many grams of calcium chloride will be produced when 30.0 g of calcium carbonate are combined with 10.0 g of hydrochloric acid? g CaCl Which reactant is in excess and how many grams of this reactant will remain after the reaction is complete? O CaCOs O HC -0 Previous Give Up&View; Solution G Check Answer Next Exit Hint

Explanation / Answer

CaCO3 + 2HCl -------------> CaCl2 + H2O + CO2

100 g CaCO3 reacts with 2 x 36.5 g HCl

30.0 g CaCO3 reacts with 30.0 x 2 x 36.5 / 100 = 21.9 g HCl

but we have only 10.0 g HCl . so HCl is limiting reagent.

2 x 36.5 g HCl gives 110.98 g CaCl2

10.0 g HCl gives 10.0 x 110.98 / 2x 36.5 = 15.2 g

mass of CaCl2 formed = 15.20 g

2 x 36.5 g HCl reacts with 100 g CaCO3

10.0 g HCl reacts with 10.0 x 100 / 2 x 36.5 = 13.70 g CaCO3

exess CaCO3 left = 30.0 - 13.70 = 16.3 g

exess CaCO3 left = 16.3 g

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