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17 Nov 2019
Please answer all 3
The next three problems refer to the following fractional precipitation experiment. Suppose a solution contains 0.6 M Ba^2+ (aq) and 0.8 M Mg^2+(aq). Fluoride ions, F^-, are then slowly added to the solution. At what [F^-] will BaF_2(s) start to precipitate? (Suggestion: Write the dissolving equation and K_sp expression for BaF_2 before starting this problem.) 3.0 times 10^-7 M 4.7 times 10^-4 M 2.7 times 10^-4 M 9.5 times 10^-4 M 5.5 times 10^-4 M At what [F^-] will MgF_2(s) start to precipitate? (Suggestion: Write the dissolving equation and K_sp expression for MgF_2 before starting this problem.) 8.8 times 10^-11 M 1.1 times 10^-5 M 9.4 times 10^-6 M 4.7 times l0^-6 M 1.9 times 10^-5 M Calculate the [Mg^2+] left in solution when Ba^2+ starts to precipitate, and then answer the following question. What percent of the original Mg^2+ is left in solution when Ba^2+ starts to precipitate? 1.6 times 10^-5 % 1.2 times 10^-1 % 1.6 times 10^-7 % 2.3 times 10^-2 % 2.9 times 10^-2 %
Please answer all 3
The next three problems refer to the following fractional precipitation experiment. Suppose a solution contains 0.6 M Ba^2+ (aq) and 0.8 M Mg^2+(aq). Fluoride ions, F^-, are then slowly added to the solution. At what [F^-] will BaF_2(s) start to precipitate? (Suggestion: Write the dissolving equation and K_sp expression for BaF_2 before starting this problem.) 3.0 times 10^-7 M 4.7 times 10^-4 M 2.7 times 10^-4 M 9.5 times 10^-4 M 5.5 times 10^-4 M At what [F^-] will MgF_2(s) start to precipitate? (Suggestion: Write the dissolving equation and K_sp expression for MgF_2 before starting this problem.) 8.8 times 10^-11 M 1.1 times 10^-5 M 9.4 times 10^-6 M 4.7 times l0^-6 M 1.9 times 10^-5 M Calculate the [Mg^2+] left in solution when Ba^2+ starts to precipitate, and then answer the following question. What percent of the original Mg^2+ is left in solution when Ba^2+ starts to precipitate? 1.6 times 10^-5 % 1.2 times 10^-1 % 1.6 times 10^-7 % 2.3 times 10^-2 % 2.9 times 10^-2 %
Collen VonLv2
10 Nov 2019