Answer to Question #150846 in Chemistry for Johnson

Question

1. In the following equation, label the Bronsted-Lowry acid, base and conjugate pairs. (2 marks)
CH3NH2 (aq) + H2PO4- (aq) ↔ CH3NH3+ (aq) + HPO42- (aq)
2. Complete the following table: (8 marks)
[H+
] pH [OH-
] pOH Acid or Base?
3.47 x 10-12
1.50
1.66 x 10-6
7.41
3. What is the pH of a solution of 0.00200 M HI? (3 marks)
4. What is the Ka for chloroacetic acid (C2H3ClO2) which has a pH of 1.52 in a 0.112 M solution? (4
marks)
5. What is the [H+
] and pH of a 0.400 M solution of hypobromous acid (HBrO)? The Ka for
hypobromous acid is 2.8 x 10-9
. (4 marks)
6. Identify the unknown weak acid that has a pH of 2.75 in a 0.025 M solution. (4 marks)

Answer 1

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