m/ibiscms/mod/ibis/view.phptid 4121569 Jump to... preserted by Gapling Leaing Wh

Question

m/ibiscms/mod/ibis/view.phptid 4121569 Jump to... preserted by Gapling Leaing When calcium carbonate is added to hydrochloric acid, calcium chloride,carbon dioxide, and water are produced How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with 12.0 g of hydrochloric acid? Number CaC, Which reactant is in excess and how many grams of this reactant will remain after the reaction is complete? Number O Caco O HCI g of O Previous Gno up & View Souto, 9 Check AnswerNext Exit Hint bout us careers privacy policy terms of use contact us help

Explanation / Answer

mol of CaCO3 used --> mass/MW = 27/100 = 0.27 mol of CaCO3

mol of HCl = mass/MW = 12/36.5 = 0.328767

ratio is 1:2 so

there is excess CaCO3

2 mol of Hcl --> 1 mol of CaCl2

0.328767 mol of HCl --> 1/2*0.328767 = 0.1643835 mol of CaCl2

mass of CaCl2 = mol*MW = 0.1643835 *110.98 = 18.2432 g of CaCl2

Q2.

find excess reagent:

0.27 mol of CaCO3 - 0.1643835 mol of CaCo3 reacted

mol of CaCO3 left = 0.27-0.1643835 = 0.10561 mol of CaCO3

mass = mol*MW = 0.10561*100 = 10.56 g of CaCO3

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