2. A 0.10 mol/L solution of a weak acid was found to be 4.0% dissociated. Calculate
Ka. (5 marks)
3. Calculate the pH of a 0.10 mol/L solution of ascorbic acid, H2C6H6O6 (aq) and the
equilibrium concentration of H2C6H6O6, HC6H6O6^-(aq) and C6H6O6^2- (aq). Ascorbic acid
is a polyprotic acid. (8 marks)
4. What is the value of the base ionization constant, Kb, for the acetate ion, C2H3O2^- (aq).
(3 marks)
5. Calculate the pH of a 0.100 mol/L aqueous solution of hydrazine, N2H4(aq), a weak
base. The kb for hydrazine is 1.7 x 10^-6. (5 marks)
Answers: 2
Chemistry, 21.06.2019 22:30, Arealbot
Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.
Answers: 2
Chemistry, 22.06.2019 06:30, themajesty9898
The minerals found in bones are deposited by living cells called
Answers: 1
2. A 0.10 mol/L solution of a weak acid was found to be 4.0% dissociated. Calculate
Ka. (5 marks)
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