The molar solubility of Ag_2S is 1.26 times 10^-16 M in pure water. Calculate th

Question

The molar solubility of Ag_2S is 1.26 times 10^-16 M in pure water. Calculate the K_sp for Ag_2S. Determine the molar solubility of PbSO_4 in pure water. K_sp (PbSO_4) = 1.82 times 10^-8. A. 1.82 times 10^-8 M B. 1.35 times 10^-4 M C. 9.1 times 10^-9 M D. 3.31 times 10^-16 M E. 4.48 times 10^-4 M A solution containing CaCl_2 is mixed with a solution of Li_2C_2O_4 to form a solution that is 3.5 times 10^-4 M in calcium ion and 2.33 times 10^-4 in oxalate ion. What will happen once these solutions are mixed? of CaC_2O_2 = 2.3 times 10. A. Nothing will happen since both calcium chloride and lithium oxalate are soluble compounds B. Nothing will happen since K_sp > Q for all possible precipitants C. A precipitate will form since calcium oxalate is not soluble to any extent D. A precipitate will form since Q > K_sp for calcium oxalate E. An ion complex will form causing precipitation of LiCl A 25.00 mL sample of propanoic acid, of unknown concentration was titrated with 0.129 M KOH. The equivalence point was reached when 35.20 mL of base had been added. What was the original concentration of the propanoic acid? K_a for propanoic acid is 1.3 times 10^-5. A. 0.129 M B. 0.364 M C. 0.182 M D. 0.091 M E. 0.295 M Which of the following compounds has the highest standard entropy per mole at 298 K? For which of the following reactions is delta S degree > 0 at 25 degree C? A. 2Li(s) + O_2(g) rightarrow Li_2O(s)

Explanation / Answer

5.) from the relation between molar solubility and ksp

molar solubility=(ksp)1/2 since the given compound is Ag2S

by substituting molar solubility value we get ksp=1.59*10-32

6.)from the above mentioned formula by sbstituting ksp=1.82*10-8 we get molar solubility= 1.35*10-4M

7.)when cacl2 reacts with Li2C2O4 , LiCl complex will form and it will be a precipitate.

9.) the highest standard entropy will be higest for gases i.e CCl4

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