Question

what is the pH of 0.001 M of Ba(OH)₂ aqueous solution and 0.001 M of HCl Solution?

Answer 1

pH of Ba(OH)2 is 11.301 and pH of HCl is 3

Answer 2

Answer: pH of 0.001 M of $Ba(OH)_2$ is 11.30 and pH of 0.001 M $HCl$ is 3.

Explanation:-

pH or pOH is the measure of acidity or alkalinity.  

pH is defined as negative logarithm of hydrogen ion concentration. pOH is defined as the negative logarithm of hydroxide ion concentration.

$pH+pOH=14$

1. $Ba(OH_2$= 0.001 M

$Ba(OH)_2\rightarrow Ba^{2+}+2OH^-$

$[OH^-]=2\times 0.001=0.002M$

$pOH=-log{0.002M]$

$pOH=2.69$

$pH+pOH=14$

$pH=14-2.69=11.30$

2. $HCl\rightarrow H^++Cl^-$

$[H^+]=0.001M$

$pH=-log[0.001]$

$pH=3$