a bc d 32. In a solution, when the concentrations of a weak acid and its conjuga

Question

a bc d 32. In a solution, when the concentrations of a weak acid and its conjugate base are equal, then a) The system is not at equilibrium b) The buffering capacity is significantly decreased c) pH of the solution equals pKa of the acid d) The acid and base will neutralize each other a bc d 33. In which of the following solutions will CaF, be least soluble? a) HC1 (aq) b) NaF (aq) c) NaOH (aq) d) Pure water d In which one of the following aqueous solutions will AgCI be most soluble? a b c 34. a) NH, b) NaCI c) HCI d) NaOH b If CaF, has a solubility of S Molar, then the solubility product is given by: a c d 35. a) 108ss b) S2 c) 4S3 d) 27s

Explanation / Answer

32.

The answer is C

PH= Pka + log[salt]/[acid] = Pka + log[conjugate base]/[acid]

[acid]= [conjugate base]

PH= Pka

33.The answer is B

CaF2 is least soluble in NaF because common ion effect.

i.e CaF2 and NaF contains F- as a common ion. when common ion is present,which decreases the solubility of the compound.

34.The ansswer is A

AgCl is most soluble in NH3 because to form complex compound.

AgCl + 2 NH3 -------------- [ Ag(NH3)2]Cl

35.The answer is C

CaF2 ----------------- ca+2 + 2 F-

Ksp = [Ca+2][F-]^2

Ksp = s x(2s)^2

Ksp = 4 s^3.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.