Question

Calculate the number of moles of hydrochloric acid present in 500 ml of 0.1 molar hydrochloric acid solution?

Answer 1

Explanation:

500 mL of a 0.1 M HCl solution contains 0.05 mol HCl to one significant figure. You could reason this out. Since 1000 mL=1 L, 500 mL=0.5 L. Halve the molarity of the 0.1 M solution, and you get 0.5 mol

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