Chemistry CH 18 Acids and Bases

question

can turn litmus paper a different color (acids or bases or both or neither)
answer

both
question

reacts with certain metals
answer

acid
question

contains more hydrogen ions than hydroxide ions
answer

acid
question

feels slippery
answer

base
question

reacts with carbonates
answer

acid
question

feels rough
answer

neither
question

contains equal numbers of hydrogen and hydroxide ions
answer

neither
question

tastes bitter
answer

base
question

tastes sour
answer

acid
question

What model of acids and bases states that an acid contains the element hydrogen and forms ions of hydrogen when it is dissolved in water?
answer

Arrhenius
question

A base contains what group?
answer

hydroxide
question

A base also dissociates to produce ions in aqueous solution. What ions do they produce?
answer

hydroxide
question

According to what model does an acid donate hydrogen ions, and a base accept hydrogen ions?
answer

Bronsted-Lowry
question

In the Bronsted-Lowry Model in an acid-base reaction, each acid has a what?
answer

Conjugate base
question

In the Bronsted-Lowry Model in an acid-base reaction, each base has a what?
answer

Conjugate acid
question

Acid A and acid B are of equal concentration and are tested with a conductivity apparatus. When the electrodes are placed in acid A, the bulb glows dimly. When they are placed in acid B, the bulb glows more brightly. Is acid a or b stronger?
answer

Acid B is stronger than acid A
question

Why is acid b stronger than acid a?
answer

acid a-the bulb glows dimly acid b-the bulb glows more brightly; Which makes acid be stronger.
question

A chemical equation for the ionization of an acid uses a single arrow to the right (–>) to separate the reactant and product sides of the equation. What does this mean for the ionizing acid?
answer

The ionizing acid is strong.
question

Is Sulfuric acid weak or strong?
answer

strong acid
question

Sulfuric acid is a strong acid. What is true about its conjugate base?
answer

Its conjugate base is weak
question

In a solution, a weak acid produces what?
answer

a mixture of molecules and ions
question

Why are K_a values all small numbers?
answer

the solutions contain a high concentration of un-ionized acid molecules
question

What dissociates entirely into metal ions and hydroxide ions in a solution?
answer

a strong base
question

In general, compounds formed from active metals, and hydroxide ions are…
answer

strong bases
question

simplest form of the chemical equation for the self-ionization of water
answer

H_2O (l) H^+(aq) + OH^-(aq)
question

The equilibrium content expression, K_eq, for this equation
answer

K_eq= [H+] [OH-]/[H2O]
question

The expression for the equilibrium constant for water, K_w
answer

K_w= [H+] [OH-]
question

Why can the concentration of water be ignored in the equilibrium expression for water?
answer

the concentration of water molecules is essentially constant
question

What is the numberical value of K_w at 298 K?
answer

1.0 x 10^-14
question

In solution, if the hydroxide ion concentration increases, what happens to the hydrogen ion concentration?
answer

decreases
question

[OH-] is greater than…
answer

1.0 x 10^-7; therefore its a base
question

The pH of a solution is the negative logarithm of what ion concentration?
answer

hydrogen
question

values for pH range from…
answer

0 to 14
question

Stomach contents can have a pH of 2, which means that they are what?
answer

acidic
question

they hydrogen ion concentration in a solution with a pH of 3 is how many times greater than the hydrogen ion concentration in a solution with a pH of 5?
answer

100 times greater
question

Does the pH of a neutral solution at room temperature equal the pOH of the solution?
answer

yes
question

If the pH of a solution is 3, its pOH is what?
answer

11
question

The pH of a solution with a [H+] of 1×10^-8 is what?
answer

8
question

The pH of a solution with a [OH-] of 1×10^-6 is what?
answer

8
question

Indicator paper can be used to measure the what of a solution?
answer

pH
question

Indicators are substances that are different what depending on the pH of the solution tested?
answer

colors
question

Another way to measure the acidity of the solution is the what?
answer

pH meter
question

what uses electrodes placed in solution to directly read the results?
answer

pH meter
question

a chemical dye that changes color based on the pH of a solution?
answer

acid-base indicator
question

a method for using a neutralization reaction to determine the concentration of a solution?
answer

titration
question

a reaction in which an acid and a base react to produce salt and water?
answer

neutralization
question

a solution of known concentration?
answer

standard solution
question

an ionic product of an acid-base reaction?
answer

salt
question

the point in a titration in which an indicator changes color?
answer

end point
question

the stoichiometric point of a titration?
answer

equivalence point
question

Water and other substances that can act as acids or bases are called?
answer

amphoteric
question

a Lewis acid is an electron-pair acceptor and a Lewis base is an electron pair donor?
answer

Lewis model
question

acids that ionize completely
answer

strong acids
question

good conductors of electricity
answer

strong acids
question

pH
answer

-log [H+]
question

pOH
answer

-log [OH-]
question

is a reaction in which an acid and a base in an aqueous solution react to produce salt and water
answer

neutralization reaction
question

the point at which moles of H+ ion from the acid equals moles of OH- ion from the base
answer

equivalence point
question

the anions of the dissociated salt accept hydrogen ions from water or the cations of the dissociated salt donate hydrogen ions to water
answer

salt hydrolysis

Get instant access to
all materials

Become a Member