Chapter 19 Acids And Bases: Question Preview (ID: 2064)

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Pure water contains which of the following species?
a) all of these
b) H2O molecules
c) OH- ions
d) H3O+ ions

What is true of the concentration of hydronium ions and hydroxide ions in pure water?
a) more than one of these answers apply.
b) They are about equal to the concentrtion of water molecules.
c) They are extremely small but still significant.
d) They are the same.

The ion-product constant for pure water is
a) equal to the product of the hydroxide and hydronium ion concentrations.
b) different from that of watr solutions
c) 1.0 x 10e-7
d) equal to Keq

For basic solution, the concentration of hydroxide ions, OH-, is
a) greater than 1 x 10e-7
b) 1 x 10e-7
c) equal to they hydronium ion concentration.
d) zero

The definition of pH is
a) -log[H3O+].
b) the percent of hydronium ions.
c) the parts per million of hydronium ions.
d) log[OH-]

If the pH of a solution changes from 10 to 11
a) hydroxide ions increase by a factor of 10
b) hydronium ions increase by a factor of 10.
c) hydronium ions decrease by 1/2.
d) hydroxide ions double.

Two common ways to measure pH are
a) with indicators and with a pH meter.
b) with indicators and a thermometer.
c) by taste and by color.
d) by electric conductivity and by temperature.

If litmus paper turns blue, the pH of the solution must be
a) above 7.0.
b) less than 4.0
c) less than 7.0.
d) acidic.

The higher the pH of a solution,
a) the greater the concentration of OH- ions.
b) the more acidic it is.
c) the less basic it is.
d) all of the above.

Which of the following 1.0 M solutions has the highest pH?
a) NaCl
b) H2SO4
c) HCl
d) H3PO4

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