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MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumPrevious Year Questions

Equal volumes of three acid solutions of pH 3, 4 and 5 are  mixed  in  a  vessel.  What  will  be  the  H⁺  ion concentration in the mixture ?  (CBSE AIPMT 2008) (a) –4 1.11 10 M x (b) 3.7 10 M x (c) 3.7 10 M x (d) 1.11 10 M x

Answer
B
Explanation

Let 1 2 3 , S S and S  be the three mixtures- 1 1 2 2 3 3 1 3 2 4 Molarity of the mixture MV M V M V M V For S ,pH 3 H 10 M For S ,pH 4 H 10 M [ ] [ ] 3 5 3 4 5 [ ] [ ] 7 For S ,pH 5 H 10 M Total  H 10 1 [ 0 10 / 3 H ] 0.0003

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