A 0.0729⋅g mass of HCl(g) was dissolved in a 50⋅mL volume of water. What is pH of this solution?

1 Answer
anor277
Oct 27, 2016

pH=−log10[H3O+]=??

pH<3

Explanation:

HCl(g)+H2O(l)→H3O++Cl−

This reaction is essentially quantitative, and the solution will be stoichiometric in H3O+.

Moles of HCl = 0.0729⋅g36.46⋅g⋅mol−1

And thus [H3O+]=0.0729⋅g36.46⋅g⋅mol−1×150×10−3L; this gives an answer in mol⋅L−1 as is required for a concentration.

And finally.....................

pH=−log10{0.0729⋅g36.46⋅g⋅mol−1×150×10−3L}

= ??

What is pOH of this solution?

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