AcidBase - Acids & Bases 1. Identify the role of each...

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Acids & Bases 1. Identify the role of each species in the following reaction using Bronsted-Lowry definitions of acids and bases. H 2 PO 4 (aq) + HCO 3 (aq) H 2 CO 3 (aq) + HPO 4 2 (aq) H 2 PO 4 (aq) HCO 3 (aq) H 2 CO 3 (aq) HPO 4 2 (aq) A acid acid conj. base conj. base B base base conj. acid conj. acid C base acid conj. acid conj. base D acid base conj. acid conj. base E acid base conj. base conj. acid 2. At 0°C, the ion-product constant of water, K w , is 1.2 x 10 —15 . The pH of pure water at 0°C is: A. 7.00 B. 6.88 C. 7.56 D. 7.46 E. 7.12 3. The conjugate acid and conjugate base of bicarbonate ion, HCO 3 , are, respectively: A. H 3 O + and OH B. H 3 O + and CO 3 2 C. H 2 CO 3 and OH D. H 2 CO 3 and CO 3 2 E. CO 3 2 and OH 4. What is the pH of 1.3 x 10 3 M aqueous sodium hydroxide solution? A. 11.1 B. 8.3 C. 7.9 D. 2.9 E. None of the above answers is correct.
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5. Choose which of the following is correct. The pH’s of the solutions will change as indicated when 100 ml of H 2 O is added to each of the following solutions: i. 100 mL of 0.02 M KCl ii. 100 mL of 0.02 M HCl A. The pH’s of both (i) and (ii) will remain the same. B. The pH of(i) will remain the same but that of (ii) will increase. C. The pH of (ii) will remain the same but that of (i) will increase. D. The pH of (i) will remain the same but that of (ii) will decrease. E. The pH of (ii) will remain the same but that of (i) will decrease. 6. What is the H + concentration in a solution with a pH of 3.75? A. 5.6 x 10 3 B. 7.5 x 10 3 C. 5.6 x 10 11 D. 1.8 x 10 4 E. 2.5 x 10 8 7. What is the pH of a 0.053 M solution of KOH? A.
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AcidBase - Acids & Bases 1. Identify the role of each...

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