Microbiology

Learn the toughest concepts covered in Microbiology with step-by-step video tutorials and practice problems by world-class tutors.

4. Water

Acids and Bases

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Acids and Bases

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Acids

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Bases

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Problem

Which of the following reactions is most consistent with that of a base?

a) NH4+ → NH3 + H+

b) H2CO3 → HCO3- + H+

c) NaOH → Na+ + OH-

d) HCl → H+ + Cl-

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Problem

The addition of an acid like HCl to an aqueous solution (pure water) would result in:

a) An increase in pH only.

b) Both the release of H+ and an increase in pH.

c) Both the release of H+ and a decrease in pH.

d) The release of H+ into the solution only.

e) A decrease in pH only.

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Problem

In what way(s) do bases work to increase the pH of a solution?

a) Increasing the concentration of hydroxide ions.

b) Decreasing the concentration of hydrogen ions.

c) Decreasing the concentration of hydroxide ions.

d) Increasing the concentration of hydrogen ions.

e) Both a & b.

f) Both c & d.