Answer to Question #148452 in General Chemistry for Chen

Question

Calcium hydroxide is reacted with hydrochloric acid. What is the weight of calcium chloride produced if 0.15N of hydrochloric acid is used and 26 kilograms of calcium hydroxide are the raw materials?

Answer 1

Ca(OH)₂ + 2HCl —> CaCl₂ + 2H₂O

0.15N (HCl) = 0.015kg = 15g

No of moles of HCl = 15/(2*35.5) = 15/71 = 0.211mol/dm³

With HCl as the limiting reagent

and molar mass of CaCl₂ as 111g/mol

Mass of CaCl₂ therefore formed = 0.211*111 = 23.45g = 0.023kg

The weight of CaCl₂ is 0.23N