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  19. The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and...

  19. The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL of

0.125 M HNO3 is ____

   [A] 13.29 [B] 8.11 [C] 11.00 [D] 12.14 [E] 7.00

20. The pH of a solution prepared by mixing 50.0 mL of 0.125 M KOH and 50.0 mL of 0.125 M HCl is ______

[A] 1.34 [B] 5.78 [C]1.90 [D] 1.14 [E] 7.0

21. Consider the following table for Ksp values

Cadmium carbonate

CdCO3

5.2 x 10-12

Cadmium hydroxide

Cd(OH)2

2.5 x10-14

Cadmium fluoride

CdF2

3.9 x10-11

Silver iodide

AgI

8.3x10-17

Zinc carbonate

ZnCO3

1.4 x 10-11

Which will have the least solubility in the given solvent?

[A] CdCO3 [B] Cd(OH)2 [C] CdF2 [D] AgI [E] ZnCO3

  22. What is the molar solubility of magnesium oxalate ( MgC2O4) in water? The solubility-

   product constant for MgC2O4 is 8.6 x 10-5 at 25 °C.

[A] 4.07 [B] 1.7 x10-4 [C] 1.3 x10-2 [D] 4.3 x10-5 [E] 9.3 x10-3

  

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queen_honey_blossom answered 2 months ago
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