ACID/BASE TheoriesACID/BASE Theories& Review& Review

What is the property of a base?

a) Bitter tasteb) Watery feelc) Strong colord) Unreactivee) nonelectrolyte

What is the charge on the hydronium ion?

a) 2-b) 1-c) 0d) 1+e) 2+

What is an acid according to Arrhenius?

a) A substance that ionizes to yield protons in aqueous solutions

b) A substance that is a hydrogen ion donor

c) A substance that accepts an electron pair

d) A substance that is a hydrogen ion acceptor

e) A substance that donates an electron pair

Which of these is an Arrhenius base?

a) LiOH

b) NH3

c) H2PO4-

d) HC2H3O2

What is transferred between a conjugate acid-base pair?

a) An electron

b) A proton

c) A hydroxide ion

d) A hydronium ion

In the reaction, NH4+ + H20 NH3 +

H30+, water behaves as a(n)

a) Arrhenius acid

b) Arrhenius base

c) Bronsted-Lowry acid

d) Bronsted-Lowry base

In the reaction, CO32- + H20 HC03

- + OH-, the carbonate ion behaves as

a(n)

a) Arrhenius acid

b) Arrhenius base

c) Bronsted-Lowry acid

d) Bronsted-Lowry base

Which of the following represents a Bronsted-Lowry conjugate acid- base

pair?

a) SO32- and SO2

b) CO32- and CO

c) H30 and H2

d) NH4+ and NH3

What does a buffer do?a) Keeps the pH of a solution constant

b) Keeps the salt concentration of a solution constant

c) Keeps the sodium concentration constant

d) Keeps the chloride concentration constant

If the hydroxide ion concentration is 10-10M, what is the pH of the solution? a) 1b) 4c) 7d) 10e) 14

For a solution to be classified as acidic, the …

a) hydrogen-ion concentration must be 10 -7 M.

b) hydrogen-ion and hydroxide-ion concentration must be equal

c) hydrogen-ion concentration must be greater that the hydroxide-ion concentration

d) hydrogen-ion concentration must be 7M or greater

A solution in which the hydroxide-ion concentration is 1 x 10 –4 M is_________?a) Acidic

b) Basic

c) Neutral

d) None of the above

What is the pH when the hydrogen ion concentration is 7.0 x 10 –3 M

a) 1.9

b) 2.2

c) 3

d) 4

What is the term used to describe a substance that can be both an acid and a

base?

a) amphoteric

b) amphoprotric

c) Bronsted acid / base

d) Arrhenius acid / base