Question

10. The formation of complex ions causes the solubility of a slightly soluble solid to: A increase B. decrease C. stay the same D. none of the above 11. The equivalence point of a titration occurs: A. when all of the analyte has been titrated (reacted B. usually just before the endpoint. C. Both A and B D. Neither A or B 12. How does a buffer resist change in pH upon addition of a strong acid? A) The strong acid reacts with the strong base in the buffer to form a salt, which produces few H* ion in solution and therefore only a little change in pH. B) The strong acid reacts with the weak base in the buffer to form a weak acid, which produces few H'ion in solution and therefore only a little change in pH. C) The strong acid reacts with the weak acid in the buffer to form a weak base, which produces few H+ ions in solution and therefore only a little change in pH. 13. The presence of an ionic atmosphere leads to soluble solids. in the solubility of slightly A. an increase B. a decrease C. no change 14. The ionic strength of a solution that contains 0.050 M NaCl and 0.025 M KNO, (both fully soluble salts) is: A. 0.150 M B. 0.050 M C. 0.075 M D. none of the above 15. IF (OH) in an aqueous solution is 4.56x10", what is the pH of the solution?

Answer 1

10.Increases

solubility of complexion sclid for eag Agil slightly follable solid - does not clissolve complelly or solubilize to a very small extent, rest remain as Solubility Product defines the solubility of Such compound and it depends upon concentration of its ions formed foreig [4g+] & [u] for Agel. when this Ag+ reacts to form complex ion eg agt + 2NHE = [ng (NH3) * - complexion Hence concentration of ion Agt is going to decrease in Agd Ž Ag tao Hence more Agt is going to from, as per Lechellien prineiple which states that equilibrium shift in direction to right Hence Solubility going to increase (to from more cause solubility to fence complex in formation increase optron A