The pH of a mixture when a 50 mL solution of pH =1 is mixed with a 50 mL solution of pH =2 is

Question

The pH of a mixture when a 50 mL solution of pH =1 is mixed with a 50 mL solution of pH =2 is (A) 0.76 (B) 1.26 (C) 1.76 (D) 2.26

Tardigrade Admin · Accepted Answer

pH =1,[ H +]=10-1 M ; pH =2,[ H +]=10-2 M M1 V1+M2 V 2=MR(V1+V2) ⇒ 10-1 × 50+10-2 × 50=MR × 100 ⇒ MR=5.5 × 10-2 M (Resultant molarity of H + ions) pH =- log (5.5 × 10-2)=1.26

Q. The pH of a mixture when a 50mL solution of pH=1 is mixed with a 50mL solution of pH=2 is

0.76

1.26

1.76

2.26

pH=1,[H+]=10−1M;pH=2,[H+]=10−2M M1​V1​+M2​V2​=MR​(V1​+V2​) ⇒10−1×50+10−2×50=MR​×100 ⇒MR​=5.5×10−2M (Resultant molarity of H+ ions) pH=−log(5.5×10−2)=1.26

Q. The $p H$ of a mixture when a $50 m L$ solution of $p H = 1$ is mixed with a $50 m L$ solution of $p H = 2$ is