30 cc of M 3 HCl , 20 cc of M 2 HNO ₃ and 40 cc of M 4 NaOH solutions are mixed and the volume was made up to 1 dm ³ . The pH of the resulting solution is

Step-by-step solution

Total milliequivalents of H ⁺ =30 1 3 +20 1 2 =20 Total milliequivalents of OH ⁻ =40 1 4 =10 Milli equivalence of H ⁺ left gathered =20-10=10 [ H ⁺ ]= 10 1000 g ions / dm ³=10⁻² pH =2 gathered