1
answer
0
watching
172
views
10 Nov 2019
A 25.0 mL sample of 0.200 M HClO(aq) is titrated with 0.250 M NaOH(aq). What is the pH of a solution when 85.0% of the acid is titrated? (K_a of HClO = 3.5 times 10^-8) a. 6.70 b. 7.39 c. 7.46 d. 7.55 e. 8.21 The K_sp of CaSO_4 is 4.9 times 10^-5 at 25 degree C. What is the concentration of Ca^2+ in a saturated solution of CaSO_4? a. 2.4 times 10^-9 M b. 2.5 times 10^-5 M c. 4.9 times 10^-5 M d. 7.0 times 10^-3 M e. 3.7 times 10^-2 M What is the molar solubility of Fe(OH)_3(s) in a solution that is buffered at pH 2.75 at 25 degree C? The K_sp of Fe(OH)_3 is 6.3 times 10^-38 at 25 degree C. a. 1.1 times 10^-29 mol/L b. 1.1 times 10^-26 mol/L c. 2.0 times 10^-15 mol/L d. 2.2 times 10^-10 mol/L e. 3.5 times 10^-4 mol/L An aqueous solution contains 0.010 M Br^- and 0.010 MI^-. If Ag^+ is added until AgBr(s) just begins to precipitate, what are the concentrations of Ag^+ and I^-? (K_sp of AgBr = 5.4 times 10^-13, k_sp of Agl = 8.5 times 10^-17) a. [Ag^+] = 5.4 times 10^-11 M, [I^-] = 1.0 times 10^-2 M b. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 1.0 times 10^-2 M c. [Ag^+] = 5.4 times 10^-11 M, [I^-] = 1.6 times 10^-6 M d. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 6.4 times 10^1 M e. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 1.6 times 10^-6 M What is the coordination number of the central metal ion in [Ni(en)_2(OH)_2]?
A 25.0 mL sample of 0.200 M HClO(aq) is titrated with 0.250 M NaOH(aq). What is the pH of a solution when 85.0% of the acid is titrated? (K_a of HClO = 3.5 times 10^-8) a. 6.70 b. 7.39 c. 7.46 d. 7.55 e. 8.21 The K_sp of CaSO_4 is 4.9 times 10^-5 at 25 degree C. What is the concentration of Ca^2+ in a saturated solution of CaSO_4? a. 2.4 times 10^-9 M b. 2.5 times 10^-5 M c. 4.9 times 10^-5 M d. 7.0 times 10^-3 M e. 3.7 times 10^-2 M What is the molar solubility of Fe(OH)_3(s) in a solution that is buffered at pH 2.75 at 25 degree C? The K_sp of Fe(OH)_3 is 6.3 times 10^-38 at 25 degree C. a. 1.1 times 10^-29 mol/L b. 1.1 times 10^-26 mol/L c. 2.0 times 10^-15 mol/L d. 2.2 times 10^-10 mol/L e. 3.5 times 10^-4 mol/L An aqueous solution contains 0.010 M Br^- and 0.010 MI^-. If Ag^+ is added until AgBr(s) just begins to precipitate, what are the concentrations of Ag^+ and I^-? (K_sp of AgBr = 5.4 times 10^-13, k_sp of Agl = 8.5 times 10^-17) a. [Ag^+] = 5.4 times 10^-11 M, [I^-] = 1.0 times 10^-2 M b. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 1.0 times 10^-2 M c. [Ag^+] = 5.4 times 10^-11 M, [I^-] = 1.6 times 10^-6 M d. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 6.4 times 10^1 M e. [Ag^+] = 8.5 times 10^-15 M, [I^-] = 1.6 times 10^-6 M What is the coordination number of the central metal ion in [Ni(en)_2(OH)_2]?
Beverley SmithLv2
12 Apr 2019