Buffering Capacity

    1) If a buffer is prepared using 0.75 mol HC₂H₃O₂ and 0.45 mol C₂H₃O₂^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 10. g NaOH is added?

(a) Yes, the concentration of acetate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of acetic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of acetate is not high enough to neutralize the hydroxide.

(d) No, the concentration of acetic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

 

    2) If a buffer is prepared using 0.50 mol HC₂H₃O₂ and 0.50 mol C₂H₃O₂^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 30. g NaOH is added?

(a) Yes, the concentration of acetate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of acetic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of acetate is not high enough to neutralize the hydroxide.

(d) No, the concentration of acetic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

 

    3) If a buffer is prepared using 0.75 mol HC₂H₃O₂ and 0.45 mol C₂H₃O₂^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 20. g HCl is added?

(a) Yes, the concentration of acetate ions is great enough to neutralize the acid.

(b) Yes, the concentration of acetic acid is great enough to neutralize the acid.

(c) No, the concentration of acetate is not high enough to neutralize the acid.

(d) No, the concentration of acetic acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

 

    4) If a buffer is prepared using 0.55 mol CH₃CHOHCOOH and 0.45 mol CH₃CHOHCOO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 5.0 g LiOH is added?

(a) Yes, the concentration of lactate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of lactic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of lactate is not high enough to neutralize the hydroxide.

(d) No, the concentration of lactic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

 

    5) If a buffer is prepared using 0.50 mol CH₃CHOHCOOH and 0.65 mol CH₃CHOHCOO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 35 g KOH is added?

(a) Yes, the concentration of lactate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of lactic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of lactate is not high enough to neutralize the hydroxide.

(d) No, the concentration of lactic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

 

    6) If a buffer is prepared using 0.15 mol CH₃CHOHCOOH and 0.30 mol CH₃CHOHCOO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 15 g HBr is added?

(a) Yes, the concentration of lactate is great enough to neutralize the acid.

(b) Yes, the concentration of lactic acid is great enough to neutralize the acid.

(c) No, the concentration of lactate is not high enough to neutralize the acid.

(d) No, the concentration of lactic acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

 

    7) If a buffer is prepared using 0.45 mol CH₃CHOHCOOH and 0.25 mol CH₃CHOHCOO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 30. g HClO₄ is added?

(a) Yes, the concentration of lactate is great enough to neutralize the acid.

(b) Yes, the concentration of lactic acid is great enough to neutralize the acid.

(c) No, the concentration of lactate is not high enough to neutralize the acid.

(d) No, the concentration of lactic acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

 

    8) If a buffer is prepared using 0.60 mol C₆H₅COOH and 0.35 mol C₆H₅COO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 10. g LiOH is added?

(a) Yes, the concentration of benzoate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of benzoic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of benzoate is not high enough to neutralize the hydroxide.

(d) No, the concentration of benzoic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

    9) If a buffer is prepared using 0.75 mol C₆H₅COOH and 0.95 mol C₆H₅COO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 50. g KOH is added?

(a) Yes, the concentration of benzoate is great enough to neutralize the hydroxide.

(b) Yes, the concentration of benzoic acid is great enough to neutralize the hydroxide.

(c) No, the concentration of benzoate is not high enough to neutralize the hydroxide.

(d) No, the concentration of benzoic acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

   10) If a buffer is prepared using 0.20 mol C₆H₅COOH and 0.40 mol C₆H₅COO^- in 1.0 L aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 15 g HNO₃ is added?

(a) Yes, the concentration of benzoate is great enough to neutralize the acid.

(b) Yes, the concentration of benzoic acid is great enough to neutralize the acid.

(c) No, the concentration of benzoate is not high enough to neutralize the acid.

(d) No, the concentration of benzoic acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

   11) If a buffer is prepared using 0.65 mol C₆H₅COOH and 0.35 mol C₆H₅COO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 50. g HClO₄ is added?

(a) Yes, the concentration of benzoate is great enough to neutralize the acid.

(b) Yes, the concentration of benzoic acid is great enough to neutralize the acid.

(c) No, the concentration of benzoate is not high enough to neutralize the acid.

(d) No, the concentration of benzoic acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

   12) If a buffer is prepared using 0.50 mol HClO and 0.30 mol ClO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 20. g KOH is added?

(a) Yes, the concentration of hypochlorite is great enough to neutralize the hydroxide.

(b) Yes, the concentration of hypochlorous acid is great enough to neutralize the hydroxide.

(c) No, the concentration of hypochlorite is not high enough to neutralize the hydroxide.

(d) No, the concentration of hypochlorous acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

   13) If a buffer is prepared using 0.60 mol HClO and 0.75 mol ClO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 20. g LiOH is added?

(a) Yes, the concentration of hypochlorite is great enough to neutralize the hydroxide.

(b) Yes, the concentration of hypochlorous acid is great enough to neutralize the hydroxide.

(c) No, the concentration of hypochlorite is not high enough to neutralize the hydroxide.

(d) No, the concentration of hypochlorous acid is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

   14) If a buffer is prepared using 0.65 mol HClO and 0.50 mol ClO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 5.0 g HCl is added?

(a) Yes, the concentration of hypochlorite is great enough to neutralize the acid.

(b) Yes, the concentration of hypochlorous acid is great enough to neutralize the acid.

(c) No, the concentration of hypochlorite is not high enough to neutralize the acid.

(d) No, the concentration of hypochlorous acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

   15) If a buffer is prepared using 0.40 mol HClO and 0.35 mol ClO^- in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 35 g HBr is added?

(a) Yes, the concentration of hypochlorite is great enough to neutralize the acid.

(b) Yes, the concentration of hypochlorous acid is great enough to neutralize the acid.

(c) No, the concentration of hypochlorite is not high enough to neutralize the acid.

(d) No, the concentration of hypochlorous acid is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

   16) If a buffer is prepared using 0.35 mol NH₄⁺ and 0.20 mol NH₃ in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 15 g KOH is added?

(a) Yes, the concentration of ammonia is great enough to neutralize the hydroxide.

(b) Yes, the concentration of ammonium ions is great enough to neutralize the hydroxide.

(c) No, the concentration of ammonia is not high enough to neutralize the hydroxide.

(d) No, the concentration of ammonium ions is not high enough to neutralize the hydroxide.

(e) No, a weak acid cannot neutralize a strong base.

   17) If a buffer is prepared using 0.55 mol NH₄⁺ and 0.40 mol NH₃ in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 30. g HI is added?

(a) Yes, the concentration of ammonia is great enough to neutralize the acid.

(b) Yes, the concentration of ammonium ions is great enough to neutralize the acid.

(c) No, the concentration of ammonia is not high enough to neutralize the acid.

(d) No, the concentration of ammonium ions is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

   18) If a buffer is prepared using 0.65 mol NH₄⁺ and 0.55 mol NH₃ in 1.0 L of aqueous solution, is the buffering capacity of the solution great enough to maintain its pH if 50. g HNO₃ is added?

(a) Yes, the concentration of ammonia is great enough to neutralize the acid.

(b) Yes, the concentration of ammonium ions is great enough to neutralize the acid.

(c) No, the concentration of ammonia is not high enough to neutralize the acid.

(d) No, the concentration of ammonium ions is not high enough to neutralize the acid.

(e) No, a weak base cannot neutralize a strong acid.

 

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