Question

Which of the following solution is acidic in nature?

• A. 20ml of 0.1 $M{H}_{2}S{O}_4$ + 20ml of 0.3 $MNaOH$
• B. 10ml of 0.1 $M{H}_{2}S{O}_4$ + 20ml of 0.2 $MNaOH$
• C. 10ml of 0.1 $M{H}_{2}S{O}_4$ + 10ml of 0.1 $MNaOH$
• D. 20ml of 0.1 $M{H}_{2}S{O}_4$ + 40ml of 0.1 $MNaOH$

Answer 1

Answer: (C)

10ml of 0.1 $M{H}_{2}S{O}_4$ + 10ml of 0.1 $MNaOH$

(A) Eq. mole of $H_{2}S{O}_4=2\times 0.1\times 20;eq.moleofNaOH=0.3\times 20$

(B) Eq. mole of $H_{2}S{O}_4=2\times 0.1\times 10;eq.moleofNaOH=0.2\times 20$

(C) Eq. mole of $H_{2}S{O}_4=0.1\times 2\times 10;eq.moleofNaOH=0.1\times 10$

[D] Eq. mole of $H_{2}S{O}_4=0.1\times 2\times 20;eq.moleofNaOH=0.1\times 40$

Only in option [C], eq. mole of $H_{2}S{O}_4>$ eq. mole of $NaOH$, so it is acidic.