200 mL of M / 5 dibasic acid is mixed with 150 mL of M / 2 monoacid base. The pH of the resulting solution is likely to be

Question

200 mL of M / 5 dibasic acid is mixed with 150 mL of M / 2 monoacid base. The pH of the resulting solution is likely to be (A) More than 7 (B) Less than 7 (C) Equal to 7 (D) Uncertain

Tardigrade Admin · Accepted Answer

b(M V)A=2 × (1/5) × 200=80 millimoles a( MV ) B =1 × (1/2) × 150=75 millimoles ⇒ Acid dominates, pH < 7

Q. $200 m L$ of $M /5$ dibasic acid is mixed with $150 m L$ of $M /2$ monoacid base. The $p H$ of the resulting solution is likely to be

More than 7

Less than 7

Equal to 7

Uncertain

$b (M V)_{A} = 2 \times \frac{1}{5} \times 200 = 80$ millimoles

$a (M V)_{B} = 1 \times \frac{1}{2} \times 150 = 75$ millimoles

$\Rightarrow$ Acid dominates, $p H < 7$

Q. 200mL of M/5 dibasic acid is mixed with 150mL of M/2 monoacid base. The pH of the resulting solution is likely to be