down then up to add to the power of it.
Answer: The difference in the pH values of the two solutions is 2.7
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.
a) For solution A, let
= 
Putting in the values:
b) For solution B,
=
Putting in the values:
Thus the difference in pH will be (4-1.3)= 2.7.
Bent, the lone pair on the central atom push away the other atoms and the most stable configuration of the lone pair and two atoms is trogonal planar. But since you cannot see the lone pair, the shape of the three atoms is bent.