When titrating a weak monoprotic acid with KOH at 25 degree C, the pH will be gr

Question

When titrating a weak monoprotic acid with KOH at 25 degree C, the pH will be greater than 7 at the equivalence point. Titration will require more moles of acid than base to reach the equivalence point. pH will be equal to 7 at the equivalence point. A 100.0 mL sample of 0.18 M HCIO_4 is titrated with 0.27 M LiOH. Determine the pH of the solution after the addition of 30.0 mL of LiOH. 2.00 2.86 1.74 0.076 1.12 A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution after the addition of 100.0 mL of KOH. The K_a of HF is 3.5 times 10^-4 3.46 4.15 4.33 2.08 3.15 A 100.0 mL sample of 0.10 M NH_3 is titrated with 0.10 M HNO_3. Determine the pH of the solution after the addition of 150.0 mL of HNO_3. The K_b of NH_3 is 1.8 times 10^-5. 7.56 12.30 2.30 6.44 1.70

Explanation / Answer

1.

answer is

pH is greater than 7

option A is the correct answer

explanation

given acid is mono protic acid lets HA

Base is strong base KOH

salt at equilent point is KA

this salt formed from week acid and strong base so pH is greater thann 7

why option B is wrong

here both are mono protic acid and mono protic base

both required in one one mole

so option B is wrong

why option C is wrong?

strong acid strong base reaction only pH 7

but hereacid is week and base is strong so it is not 7

why option D is wrong

here both are mono protic acid and mono protic base

both required in one one mole

so option D is wrong

why E is wrong

if acid is strong and base is week then resultatnt pH will be less than seven

but here it is reverse

so this option is wrong

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