Calculate the pH of a solution which contains 10 ml of 1 M HCl and 10 ml of 2 M NaOH

Question

Calculate the pH of a solution which contains 10 ml of 1 M HCl and 10 ml of 2 M NaOH (A) 11.7 (B) 12.7 (C) 13.7 (D) 10.7

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/ca81dfcd36e171e300a7902920e7c12b-.png" /> [ OH -] left from NaOH =(10/20)=0.5 M pOH =- log OH -=- log 0.5 pOH =0.3 pH =13.7

Q. Calculate the $p H$ of a solution which contains $10 m l$ of $1 M H Cl$ and $10 m l$ of $2 M N a O H$

11.7

12.7

13.7

10.7

$[O H^{-}]$ left from $N a O H = \frac{10}{20} = 0.5 M$

$pO H = - lo g O H^{-} = - lo g 0.5$

$pO H = 0.3$

$p H = 13.7$

Q. Calculate the pH of a solution which contains 10ml of 1MHCl and 10ml of 2MNaOH