Acids and Bases (AP Chem) 11th - 12th Grade Quiz

Acids and Bases (AP Chem)

Assessment

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Caroline Duesing

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Chemistry

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11th - 12th Grade

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298 plays

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Medium

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15 questions

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Multiple Choice

15 mins

1 pt

A buffer solution is prepared by mixing equal volumes of 0.50 M weak acid with 1.0 M of its conjugate base. Based on the data given in the table above, which of the following pairs of chemical solutions should be used to prepare the buffer solution so that the pH will be between 4 and 7?

CH₃COOH and NH₃

CH₃COOH and CH₃COONa

H₂CO₃ and NH₃

H₂CO₃ and Na₂CO₃

Multiple Choice

15 mins

1 pt

Ascorbic acid, H₂C₆H₆O₆(s), is a diprotic acid with K₁ = 7.9 × 10^–5 and K₂ = 1.6 × 10^–12. In a 0.005 M aqueous solution of ascorbic acid, which of the following species is present in the lowest concentration?

H₃O⁺(aq)

H₂C₆H₆O₆(aq)

HC₆H₆O₆^-(aq)

C₆H₆O₆^2-(aq)

Multiple Choice

15 mins

1 pt

In the titration of a weak acid of unknown concentration with a standard solution of a strong base, a pH meter was used to follow the progress of the titration. Which of the following is true for this experiment?

The [H⁺] at the equivalence point equals the ionization constant of the acid.

The pH at the equivalence point depends on the indicator used.

The graph of pH versus volume of base added rises gradually at first and then much more rapidly.

The graph of pH versus volume of base added shows no sharp rise.