chapter 14 and 15 chem

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Which of the following values for enthalpy of solution at 25ºC represents the greatest release of energy?

-3.59

The pH scale in general use ranges from

0-14

The pH of a solution is 10.00. What is its OH- concentration?

1.0 x 10^-4 M

What is the product of H3O+ ion and OH- ion concentrations in water?

10^-14

when the concentration is in water it is always

10^-14

Which expression represents the concentration of H3O+ ions in solution?

10^-14 ,(COMMA) [OH-]

What is the concentration of H3O+ ions in pure water?

10^-7 M

The ideal gas law combines Boyle's law, Charles's law, Gay-Lussac's Law and

Avogadro's Law

Which is a Lewis acid but not a Bronsted-Lowry acid?

BF3

Whose definition of acids and bases emphasizes the role of protons?

Bronsted-Lowry

Whose theory of acids and bases do conjugate acids and bases belong to?

Bronsted-Lowry

Which compound is produced by a neutralization?

H2O(l)

Which of the following is not an oxyacid?

H2O2

Which of the following is a triprotic acid?

H3PO4

Which of the following is chloric acid?

HClO3

Which of the following is perchloric acid?

HClO4

Whose acid definition is the broadest?

Lewis

An electron-pair donor is a

Lewis base

Whenever ammonia donates an electron pair to form a covalent bond, it acts as a(n)

Lewis base

The density of a substance undergoes the greatest change when the substance changes from a

Liquid to gas

Which of the following gases does not dissolve in atmospheric water to produce acidic solutions

O2

Which statement about Arrhenius acids is false?

They increase the concentration of hydroxide ions in aqueous solution

A standard solution always contains

a known concentration of solute

Bases react with

acids to produce salts and water

A species that can react as either an acid or a base is a(n)

amphoteric substance

A base is weak if its tendency to

attract a proton is slight

The name of a binary acid

begins with the prefix hydro-

Aqueous solutions of acids

carry electricity

What unknown quantity can be calculated after performing a titration?

concentration

When water is warmed from its freezing temperature to its temperature of maximum density, it

contracts

At its triple point, water can

exist in equilibrium in 3 different phases

When added to water, acids produce ________ ion in solution.

hydrogen

Which of the following is a molecular substance whose aqueous solution carries an electric current?

hydrogen chloride

An Arrhenius acid contains

hydrogen that ionizes to form hydrogen ions

What is the key substance found in all basic solutions?

hydroxide

When added to water, bases produce __________ ion in solution.

hydroxide

Dyes with pH-sensitive colors are used as

indicators

A conjugate acid is the species that

is formed by the addition of a proton to a base

What happens to the temperature of a substance when it is melting?

it remains the same

Which indicator is used to study neutralization of a strong acid with a weak base?

methyl orange

In a conjugate acid-base pair, the acid typically has

one more proton than the base

An acid-base titration is carried out by monitoring

pH

A Brønsted-Lowry base is a(n)

proton acceptor

Which of the following is not a reactant in a neutralization reaction?

salt

Which of the following is at equilibrium when undissolved solute is visible?

saturated solution

Pure water partially breaks down into charged particles in a process called

self-ionization

if a substance has a great tendency to give up protons, it's conjugate has a

slight tendency to attract protons

Which of the following is a homogeneous mixture of substances in a single phase?

solution

Glycerol boils at a slightly higher temperature than water. This reveals that glycerol's attractive forces are

stronger than those of water

if the temperature and the surface area of a liquid remain constant

the rate of evaporation remains constant

What process measures the amount of a solution of known concentration required to react with a measured amount of a solution of unknown concentration?

titration

Many organic compounds, such as codeine, that contain nitrogen are

weak bases

Which solute is present in aqueous solution mostly as molecules rather than as ions?

weak electrolyte

When titrating a weak acid with a strong base, the equivalence point

will be above a pH of 7.0


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