PART 1) What is the conjugate base of HSo. A) OH ) H.SO D) HSO What is the pli o
ID: 590402 • Letter: P
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PART 1) What is the conjugate base of HSo. A) OH ) H.SO D) HSO What is the pli of a 02 M BakOH) solution A)+2.60 C)-11.4 of the following aqueous solutions has the lowest concentration A) pH-3.21 C) pH-7.93 B)-260 3) Which D) 13.6 of H B) pOH-14 D) POH-4.18 4 Which of the following acids is the strongest C)HCN(K-5.8 x 10-19) 5) Which of the following salts when dissolved in water will give a basic soletion A) NaCI B) KI D) NaBr C) LiF 6) Which of the following salts when dissolved in water will give a acidie solution B) KC D) NaNO A) LiBr C) NH 7) The value of K, for water at 50 is55 10 .. What will be the pH ofwater B) 10 A) 7 D) 6.6 C) 5.5 A) urea (Kb 1.53 x 104) B)ammonia(KB18) C) aniline (KB-3.8x10) D) caffeie (B-4110*) 8) Which of the following bases is the strongest baseExplanation / Answer
1) the anion formed from the deprotonation of base is called conjugate base. here deprotonation of HSO4- will give SO42- as conjugate base. Answer : C
2) Ba(OH)2 --> Ba2+ + 2 OH-
[OH-] = 2 X 0.2 = 0.4 M
=> pOH = - log[OH-] = 0.4 => pH = 14 - pOH = 13.6
Answer D
3) solution having highest pH will have lowest H+ concentration
pH= 14- pOH => solution B will have highest pH and hence lowest H+ concentration => Answer B
4) acid having largest Ka value will be the strongest among all HClO has highest K value => asnwer is D
5) the higher the basicity of anion the more basic the solution will be , moving down the periodic table the basicity of anion decreases => LiF will give a basic solution => Asnwer C
6) only NH4I can release H+ in the solution making it acidic = > Answer C
7) Kw = [H+][OH-] [H+]= [OH-] => Kw = [H+]2 => [H+] = (Kw)0.5
=> pH = -log[H+] = -0.5 x log Kw = 6.63
8) base having largest Kb value will be the strongest among all caffeine has largest Kb value => Answer D
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