Question

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed ?

Answer 1

when equal volumes of acid and bases are mixed then resulting solution alkaline if the concentrartion of base is taken high

n1v1-n2v2= NV

0.1*1 - 0.01*1 = N*2

N=0.09/2 = 0.045
[OH-] = 0.045N
pOH= -log(0.045) = 1.35

pH = 14-pOH
pH= 14-1.35  = 12.65