hw6 - amg2845 hw06 McCord(53580 This print-out should have...

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amg2845 – hw06 – McCord – (53580) 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Which of the five solutions below is most ba- sic? 1. 0.10 M CH 3 COOH and 0.20 M NaCH 3 COO 2. 0.10 M CH 3 COOH and 0.10 M NaCH 3 COO 3. 0.10 M aq NH 3 and 0.10 M NH 4 Cl 4. 0.10 M aq NH 3 and 0.20 M NH 4 Cl 5. 0.10 M HClO and 0.10 M NaClO 002 10.0 points Carbonic acid (H 2 CO 3 ) is a diprotic acid with K a1 = 4 . 2 × 10 - 7 and K a2 = 4 . 8 × 10 - 11 . The ion product for water is K w = 1 . 0 × 10 - 14 . What is the [HCO - 3 ] concentration in a 0.037 M H 2 CO 3 solution? 1. 4 . 2 × 10 - 7 M 2. 3 . 7 × 10 - 2 M 3. 1 . 6 × 10 - 8 M 4. 4 . 8 × 10 - 11 M 5. 1 . 2 × 10 - 4 M 003 10.0 points A 0.50 M solution of dimethylamine (a weak base with K b = 7 . 4 × 10 - 4 ) would be resistant to large changes of pH Z1) when a strong acid is added, but not if a strong base is added. Z2) when a strong base is added, but not if a strong acid is added.
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