Question

Equal volume of two solution of ph 2 and 12 are mixed together at 90 c and ph of resulting solution

Answer 1

it's a neutral solution because ph 2 is strong acid and ph 12 is strong base so the ph of resultant solution is 7

Answer 2

pH of resulting solution is 2.3

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

1. pH = 2

$pH=-\log [H^+]$

Putting in the values:

$2=-\log[H^+]$

$[H^+]=10^{-2}$

2. pH = 12

$pH=-\log [H^+]$

Putting in the values:

$12=-\log[H^+]$

$[H^+]=10^{-12}$

Thus total $[H^+]=\frac{10^{-2}+10^{-12}}{2}=0.005$

pH of resulting solution , $pH=-\log[H^+]=-\log[0.005]=2.3$

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