Deck 10: Acids and Bases and Equilibrium

Question 1

Ammonium hydroxide is a weak base because ________.

A)it forms a dilute solution
B)it is only slightly soluble in water
C)is a poor acceptor of protons
D)it dissociates only slightly in water
E)it is completely ionized in aqueous solution

Answer 1

it dissociates only slightly in water

Question 2

A chemical reaction has reached equilibrium when ________.

A)the concentrations of reactants and products are equal
B)all reactants have been converted to products
C)all products have been removed from the reaction mixture
D)the catalyst has been used up
E)the rate of the forward reaction equals the rate of the reverse reaction

Answer 2

the rate of the forward reaction equals the rate of the reverse reaction

Question 3

What is the [ ] in a solution with [ ] = 1 × M?

A)1 × M
B)1 × M
C)1 × M
D)1 × M
E)1 × M

Answer 3

1 × M

Question 4

According to the Arrhenius concept,if were dissolved in water,it would act as ________.

A)a base
B)an acid
C)a source of hydroxide ions
D)a source of H- ions
E)a proton acceptor

Question 5

Identify the Brønsted-Lowry acid in the following reaction. O(l)+ (aq)→ (aq)+ (aq)

A) O
B)
C)
D)OH-
E)H2CO3

Question 6

The name given to an aqueous solution of HBr is ________.

A)hydrogen bromide
B)hydrobromic acid
C)bromic acid
D)bromous acid
E)hypobromous acid

Question 7

Which of the following is correctly identified?

A) ,strong acid
B)NaOH,strong base
C)HCl,weak acid
D) ,strong acid
E)Ca ,weak base

Question 8

The name of is ________.

A)aluminum trihydroxide
B)monoaluminum trihydroxide
C)aluminum hydroxide
D)aluminum(III)hydroxide
E)aluminum oxygen hydride

Question 9

Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution?

A)In acids,[ ] is greater than [ ].
B)In bases,[ ] = [ ].
C)In neutral solutions,[ ] = [ O].
D)In bases,[ ] is greater than [ ].
E)In bases,[ ] is less than [ ].

Question 10

According to the Brønsted-Lowry definition,________.

A)an acid is a proton acceptor
B)a base produces ions in aqueous solutions
C)a base is a proton donor
D)a base is a proton acceptor
E)an acid acts as the solvent

Question 11

According to LeChâtelier's principle,predict whether adding causes the system to shift in the direction of reactants,products,or no change. N (aq)+ O(l)⇌ N (aq)+ (aq)

A)reactants
B)products
C)no change

Question 12

Which of the following is the strongest acid?

A)
B)
C)NaOH
D)
E)HCl

Question 13

The correct formula for sulfuric acid is ________.

A)
B)
C)
D)
E)

Question 14

When a reaction is at equilibrium,________.

A)all reaction stops
B)no more reactants are converted to products
C)the reaction is no longer reversible
D)the forward and reverse reactions occur at the same rate
E)the products and reactants have the same energy content

Question 15

The conjugate base of O is ________.

A)
B)
C) O
D)
E) O has no conjugate base.

Question 16

Which one of the following is characteristic of a base?

A)produces in water
B)has a sour taste
C)has a slippery,soapy feel
D)turns blue litmus red
E)is insoluble in water

Question 17

The conjugate acid of O is ________.

A)
B)
C) O
D)
E) O has no conjugate acid.

Question 18

Which one of the following is characteristic of an acid?

A)produces in water
B)has a bitter taste
C)has a slippery,soapy feel
D)turns litmus blue
E)is insoluble in water

Question 19

For ,the product of [ ] and [ ] is ________.

A)1.0 ×
B)1.0 ×
C)1.0 ×
D)1.0
E)1.0 ×

Question 20

According to LeChâtelier's principle,predict whether adding H2O causes the system to shift in the direction of reactants,products,or no change. N (aq)+ O(l)⇌ N (aq)+ (aq)

A)reactants
B)products
C)no change

Question 21

What is the pH of a solution with [ ] = 1 × M?

A)1.0 ×
B)-9.0
C)5.0
D)-5.0
E)9.0

Question 22

Which of the following is a buffer system?

A)NaCl(aq)and (aq)
B)HCl(aq)and NaOH(aq)
C) (aq)and (aq)
D)NaCl(aq)and NaOH(aq)
E) O(l)and HCl(aq)

Question 23

Which of the following is the correctly balanced equation for the complete neutralization of by ?

A) (aq)+ Ca (s)→ CaH (aq)+ 2 O(l)
B)3 (aq)+ Ca (s)→ (aq)+ 5 O(l)
C) (aq)+ Ca (s)→ (aq)+ O(l)
D)2 (aq)+ 3Ca (s)→ (aq)+ 6 O(l)
E)4 (aq)+ 6Ca (s)→ 2 (aq)+ 12 O(l)

Question 24

What is the [ ] in a solution with [ ] = 2.5 × M?

A)2.5 × M
B)4.0 × M
C)4.0 × M
D)4.0 × M
E)1.0 × M

Question 25

25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution.The molarity of the HCl solution is ________.

A)0.212 M
B)0.115 M
C)0.500 M
D)0.390 M
E)0.137 M

Question 26

Normal blood pH is about ________.

A)6.8
B)7.0
C)7.2
D)7.4
E)7.6

Question 27

What is the pH of a solution with [ ] = 1 × M?

A)10.0
B)-10.0
C)4.0
D)-4.0
E)1.0 ×

Question 28

In a buffer system of HF and its salt,NaF,________.

A)the HF neutralizes added acid
B)the HF neutralizes added base
C)the HF is not necessary
D)the neutralizes added O
E)the neutralizes added base

Question 29

The neutralization reaction between and produces the salt with the formula ________.

A) O
B)
C)
D) )3
E) OH

Question 30

A solution with [ ] of 5 × has a pH of ________.

A)2.3
B)-2.3
C)11.7
D)7.0
E)5.0

Question 31

The [ ] of a solution with pH = 8.7 is ________.

A)8.7 M
B)5.3 M
C)2 × M
D)8.7 × M
E)5 × M

Question 32

The [ ] of a solution with pH = 9.7 is ________.

A)9.7 M
B)1 × M
C)2 × M
D)5 × M
E)9.7 × M

Question 33

The [ ] of a solution with pH = 2.0 is ________.

A)10 M
B)-10 M
C)1 × M
D)1 × M
E)1 × M

Question 34

Which of the following is a neutralization reaction?

A)KCl (aq)+ (aq)→ (aq)+ NaCl(aq)
B) (aq)+ KOH(aq)→ O (l)+ (aq)
C) O(l)+ (g)→ (aq)
D)4Na(s)+ (g)→ 2 O(s)
E)2 (g)→ 2NO(g)+ (g)

Question 35

When an acid reacts with a metal like Al,the products are ________.

A)water and a base
B)water and a salt
C)water and carbon dioxide
D)a salt and carbon dioxide
E)a salt and hydrogen

Question 36

A 10.0 mL of 0.121 M H2SO4 is neutralized by 17.1 mL of KOH solution.The molarity of the KOH solution is ________.

A)0.207 M
B)0.414 M
C)0.0708 M
D)0.428 M
E)0.142 M

Question 37

The function of a buffer is to ________.

A)change color at the end point of a titration
B)maintain the pH of a solution
C)be a strong base
D)maintain a neutral pH
E)act as a strong acid

Question 38

An acid and base react to form a salt and water in a(n)________ reaction.

A)ionization
B)dissociation
C)oxidation
D)neutralization
E)reduction

Question 39

What is the [ ] in a solution that has a [ ] = 1 × M?

A)1 × M
B)1 × M
C)1 × M
D)1 × M
E)1 × M

Question 40

In a neutralization reaction ________.

A)two acids react to form water
B)water and a salt react to form an acid and a base
C)an acid and a salt react to form water and a base
D)a base and a salt react to form water and an acid
E)an acid and a base react to form a salt and water

Question 41

The conjugate base of O is .

Question 42

HBr is a strong acid.

Question 43

The conjugate base of HF is F-.

Question 44

What is the name of the medical condition of an asthmatic patient with a blood pH of 7.30?

A)respiratory acidosis
B)respiratory alkalosis
C)metabolic acidosis
D)metabolic alkalosis
E)diabetes mellitus

Question 45

When a system is at equilibrium,all the concentrations are 1 M.

Question 46

If a solution has = 1.0 × M,the is also 1.0 × M.

Question 47

The name of S is hydrosulfuric acid.

Question 48

The name of NaOH is sodium hydroxide.

Question 49

When more reactant is added to a system iat equilibrium,the reverse reaction is favored.

Question 50

Acids turn litmus blue.

Question 51

In any aqueous solution, = 1.0 × .

Question 52

When hyperventilation (rapid breathing)causes a patient to exhale large amounts of ,the blood pH rises in a condition called ________.

A)metabolic acidosis
B)metabolic alkalosis
C)respiratory acidosis
D)respiratory alkalosis
E)pulmonary distress

Question 53

A system is at equilibrium when the rate of the forward and reverse reactions are equal.

Question 54

HF is a strong acid.

Question 55

In any aqueous solution, = .

Question 56

Which of the following could be a buffer?

A)NaF(aq)
B)HF(aq)+ NaF(aq)
C)HF(aq)+ O(l)
D)NaF(aq)+ O(l)
E)NaCl(aq)+ HF(aq)

Question 57

HF is a strong acid.

Question 58

An aqueous solution with = 1.0 × has a pH of 12.0.

Question 59

KOH is a strong base.

Question 60

If lung problems like emphysema occur,the blood pH of the patient is expected to ________.

A)saturate
B)increase
C)decrease
D)stay the same
E)concentrate

Question 61

Strong acids react with Zn metal to produce H2 gas.

Question 62

A buffer is a solution that tends to maintain a neutral pH.

Question 63

An acidic solution has a pH less than 7.0.

Question 64

A solution with a pH greater than 7 is basic.

Question 65

If the carbon dioxide level in the blood is too high,more carbonic acid is produced,and this results in the condition termed acidosis.

Question 66

For many reactions of acids with bases,the resulting products are a salt and water.

Question 67

Alkalosis is the blood condition in which the blood pH is higher than normal.