Calculate the pH and pOH of the following solutions (see Appendix 11 of your textbook for pKa values): 1. 0.01 M HBr 2. 0.00005 M HBr 3. 0.00002 M KOH 4. 0.01 M CH,COOH 5. 0.00001 M CH,COOH 6. 0.01 M HIO,

Calculate the pH and pOH of the following solutions (see Appendix 11 of your textbook for pKa values): 1. 0.01 M HBr 2. 0.00005 M HBr 3. 0.00002 M KOH 4. 0.01 M CH,COOH 5. 0.00001 M CH,COOH 6. 0.01 M HIO,

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 55P

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Question

Calculate and compare the solubility (mol/L and g/L) of Ag,SO, (pKsp = 4.83) in:
(a) distilled water
(b) 0.1 M MgCl,.
(c) 0.1 M Na,sO4.
The precipitation of some ion can be treated as completed if the mass of the remaining ions in precipitated
solution will be less than 0.0001 g (the minimal mass can be weighed using typical lab balance). Calculate:
(a) the molarity of Ag* ions in 100 mL of solution, which corresponds to 0.0001 g of remaining Ag+ ions;
(b) the molarity of (NH4)2CrO4 needed to get saturated solution of Ag, CrO4 (pk®sp = 11.92) with remaining
concentration of Ag* equal to found on the previous step.

Calculate the pH and pOH of the following solutions (see
Appendix 11 of your textbook for pKa values):
1. 0.01 M HBr
2. 0.00005 M HBr
3. 0.00002 МКОН
4. 0.01 M CH,COOH
5. 0.00001 M CH,COOH
6. 0.01 M HIO,
7. 0.01 M pyridine
Calculate the pH of the following solutions:
1. 0.01 M NAHS
2. 0.005 M NaН.РО,
3. 0.005 M Na,HPO,
4. 0.005 M Na PO,
5. 0.1 ΜΝΗ,CN
Calculate the pH of the following buffer solutions:
1. 1.7 g/L of NH, and 5.35 g/L of NH,Cl.
2. 50 mL of 1 M CH,COONA and 1 L 0.1 M CH,COOH.
3. 50 mL of 1 M NaOH and 1 L 0.1 M CH,COOH.
4. 10 mL 0.1 H,PO, + 25 mL 0.1 NaOH
5. 10 mL 0.1 H,PO, + 25 mL 0.1 Na,PO,
6. A buffer solution pH=5.00 contains 0.01 M CH,COOH.
Calculate the concentration of sodium acetate it contains.
7. What weight of NH,Cl should be added to 1 L of 0.1 M
NH, solution to get pH=9.00?

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