Question

The pH of a solution is 3.0. This solution is diluted by 100 times. Then the pH of the resulting solution is
1) 5
2) 7
3) 1
4) 11



Answer....fast!!​

Answer 1

For every 10 percent dilution ph increases by 1 so resultant ph value 5

Answer 2

$\boxed{\sf \green{Answer}}$

5

$\boxed{\sf \green{Explanation}}$

Given:

pH of a solution is 3 and the solution is diluted by 100 times

To Find:

Resultant pH

Solution:

wk.t.

$\boxed{\bold \blue{pH = - log_{10} [{H}^{+}]}}$

$\bold {-3 = log_{10} [{H}^{+}]}$

$\bold { {H}^{+} = {10}^{-3}}$

The solution is diluted by 100 times

Therefore, resultant comcentration is

$M_1 V_1 = M_2 V_2$

${10}^{-3} \times 1 = M_2 \times 100$

$M_2 = \dfrac{{10}^{-3}}{100}$

$M_2 = {10}^{-5}M$

Now, the resultant pH is

$\bold {pH = -log_{10} [{10}^{-5}]}$

$\bold {pH = 5 \times log_{10} 10}$

$\bold {pH = 5}$_______option(1)