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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)
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