A solution containing CaCl_2 is mixed with a solution of Li_2 C_2 O_4.(lithium o

Question

A solution containing CaCl_2 is mixed with a solution of Li_2 C_2 O_4.(lithium oxalate) to form a solution that is 1.15 times 10^-5 M in calcium ion and 2.00 times 10^-4 M in oxalate ion. What will happen once these solutions are mixed? Ksp (Ca C_2 O_4) = 2.3 times 10^-9. A) Nothing will happen since both calcium chloride and lithium oxalate are soluble compounds. B) Nothing will happen k_sp > Q for all possible precipitants. C) A precipitate will form as calcium oxalate is not soluble to any extent. D) A precipitate will form since Q > K_sp for calcium oxalate. E) The solution will be saturated, since K_sp = Q. Consider the following reaction: CO_2 (g) + C(s, graphite) Rightwardsharpoonoverleftwardsharpoon 2 CO (g) A reaction mixture initially contains 0.82 atm CO_2, 50 mol of graphite, and nothing else in a close container. Determine the equilibrium pressure of CO if K_p for the reaction at this temperature is 2.25. A) 0.91 atm B) 0.45 atm C) 1.36 atm D) 0.57 atm E) 1.14 atm what is the conjugate acid of H_2 PO^-_4? A) HPO^2-_4 B) PO^3-_4 C) H_3 PO_4 D) H_3 O^+ E) OH^- The following titration curve indicates the titration of what kind of substance? A) strong monoprotic acid B) weak monoprotic acid C) diprotic acid D triprotic acid E) weak base What can small, multiply charged metal ions do when in an aqueous solution? A) Form a complex B) Make the solution acidic C) Be amphoteric D) All of the above

Explanation / Answer

Ans 21 - It forms complex

so option (i) is correct

Ans 20 - The three bend represents the loss of three H ions so it represents the three pKa values so it is triprotic acid as it losses three protons to reach to its ph 14 option D is correct.

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