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Chemistry
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11 Dec 2019

Compound Formula Kb
Dimethylamine (CH3)2NH 5.9 x 10-4
Pyridine C5H5N 1.7 x 10-9

1. Consider the titration of 50.00 mL 0.100 M Sr(OH)2 with 0.200 M HBr.

(a) What is the initial pH of the solution?

(b) What is the pH after the addition of 25.00 mL of HBr?

(c) What is the pH after the addition of 50.00 mL HBr?

(d) What is the pH afer the addition of 75.00 mL HBr?

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Related questions

Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.210 M pyridine, C5H5N(aq) with 0.210 M HBr(aq):

Kb= 1.7 x 10^-9

(d) after addition of 25.0 mL of HBr

(e) after addition of 32.0 mL of HBr

Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.210 M pyridine, C5H5N(aq) with 0.210 M HBr(aq):

Kb= 1.7 x 10^-9

(d) after addition of 25.0 mL of HBr

(e) after addition of 32.0 mL of HBr

1)Calculate the pH of a solution that results from mixing 10 mL of 0.11 M ammonia with 39 mL of 0.11 M ammonium chloride. The Kb value for NH3 is 1.8 x 10-5

2)A buffer that contains 0.18 M of an acid, HA and 0.31 M of its conjugate base A-, has a pH of 4.66. What is the pH after 0.034 mol of HCl are added to 0.6 L of the solution

3)Calculate the pH during the titration of 30.00 mL of 0.1000 M NaOH(aq) with 0.1000 M HNO3(aq) after 12 mL of the acid have been added

4)Calculate the pH during the titration of 20.00 mL of 0.1000 M HBrO(aq) with 0.1000 M LiOH(aq) after 8 mL of the base have been added. Ka of hypobromous acid = 2.3 x 10-9.

5)Calculate the pH during the titration of 20.00 mL of 0.1000 M methylamine, (CH3)NH2(aq), with 0.2000 M HCl(aq) after 7.5 mL of the acid have been added. Kb of methylamine = 3.6 x 10-4

6)Calculate the pH during the titration of 30.00 mL of 0.1000 M dimethylamine, (CH3)2NH(aq), with 0.1000 M HBr(aq) after 29 mL of the acid have been added. Kb of dimethylamine = 5.4 x 10-4

7)Determine the volume in mL of 0.2 M HCl(aq) needed to reach the equivalence (stoichiometric) point in the titration of 49 mL of 0.25 M NH2NH2(aq)(aq). The Kb of hydrazine is 1.7 x 10-6

8)Determine the pH at the equivalence (stoichiometric) point in the titration of 23 mL of 0.12 M C6H5COOH(aq) with 0.22 M NaOH(aq). The Ka of benzoic acid is 6.5 x 10-5

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