Question

5. Calculate the pH of a 6.7 x 10-2 M Ba(OH)2 solution. A) 13.13 B) 1.17 C) 12.82 D) 6.7 E) 2 6. For the diprotic acid H2SO3 and its acid ionization constants which statement below is true? A) Ka, 1 > Ka, 2 B) Ka, 1 = ka, 2 C) Kal <ka, 2 7. Which of these solutions has the lowest pH value? A) 0,010 M HNO3 B) 0.020 M HNO3 C) 0.010 M NH4NO3 8. Which one of the following combinations cannot function as a buffer solution? A) HCN and KCN B) NH; and (NH4)2SO4 C) HNO3 and NaNO3 D) all of the above mixtures can act as a buffer E) none of the above mixtures can act as a buffer

Answer 1

> Ba Corby 6.7x10²m Båt + 2017 6.7x10² 2x61x102 pah = -logor pOH = -log 2x6.7x10? polt = 0.8728952 pH = 14-0.8728952 pH = 13.13 6. For dipostic acid (H2S03) The dissociation of firs of first Ht having high ka, Than Second dissociation of Ht of kan A) Kai > ka z Higher the concentration Ht Lower the PH Owen 0.02m of HNO3 contain . 0.02m (ht ] will have PH B) 0.020 M HNO3 HNO3 and Nano 3 weak base con acid and it's Butter should be made by conjugate acid (or base and Nanoz is Neutral salt Here Hnoz is strong acid so butter cannot made