Question

If 20g NaOH and 36.5g HCl are added in 360g water then % by wt. HCl present in resulting mixture?

Answer 1

36.5/416.5 *100 = 8.76% approx

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Answer 2

Explanation:

First we have to find the total mass of the new solution.

msolution=360 g H2O+20 g NaOH+36.5 g HCl

=416.5 g total

Then, we divide the mass of hydrochloric acid by the mass of the new solution and multiply by 100%.

% weight HCl=36.5g416.5g⋅100%≈8.76%