determine the ph of a solution prepared by mixing 50 ml of 0 2N hcl with 50ml 0f 0 1N - Chemistry - Chemical and Ionic Equilibrium

Question

determine the ph of a solution prepared by mixing 50 ml of 0 2N hcl
with 50ml 0f 0 1N naoh?

Geetha · Accepted Answer

First find the milli equivalent of acid and baseMilli equivalent of acid = V×N = 50 × 0
2 = 10 meqMilli equivalent of base = V×N = 50 × 0
1 = 5 meqAs acid is neutralised by base, the remaining milliequivalent remaining is = 10 -5 = 5 meqThe total volume is 50 + 50 = 100 mlso the resultant normality = 5100 = 0
05 NNow the pH of the solutionpH= - log H+    = - log  (0
05)    = - log (5 × 10-2)    = 2 log 10 -log 5   = 2 - 0
6990 =1 301

determine the ph of a solution prepared by mixing 50 ml of 0.2N hcl with 50ml 0f 0.1N naoh?