PRS Questions from Lecture 11-9-11 and 11-10-11

PRS Questions from Lecture 11-9-11 and 11-10-11 - 2 (molar...

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PRS Questions from Lecture 11-9-11 and 11-10-11 Question 1 In a precipitation titration with the balanced complete formula equation shown below: 2AgNO 3 (aq) + K 2 CO 3 (aq) → 2KNO 3 + Ag 2 CO 3 (s) How many mL of 0.25M AgNO 3 would be needed to titrate 500.0 mL of 0.50M K 2 CO 3 ? Give answer to the nearest whole number (no decimal places) Question 2 In the following reaction: CH 4 + 2NO 2 → N 2 + CO 2 + 2H 2 O What is the oxidizing agent ? (Multiple choice pick one) 1. C 2. CO 2 3. CH 4 4. N 5. NO 2 6. N 2 Answers 1. 2000 mL 2. NO 2 Question 1 What mass of MgCl
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Unformatted text preview: 2 (molar mass: 95.21 g/mol) should be dissolved in 0.5000L of water to make a solution that is 0.2345 M in chloride ion? Write out answer (in g) to 4 significant figures Question 2 Which of the following would react with HBr(aq) in solution to yield the net ionic equation H + (aq) + OH (aq) H 2 O (l) ? V. MgCO 3 (s) W. HCl (aq) X. NH 3 (aq) Y. Ba(OH) 2 (aq) Z. KOH (aq) 1. V, X, Y, Z 2. V, W, X 3. Y, Z 4. Z only 5. W, Z Answers 1. 5.582 g 2. 3. Ba(OH) 2 and KOH...
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