AnswersChemistryEquilibria of Acids and Bases

Equilibria of Acids and Bases — Quiz Answers

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An acid has a molarity of 0 point 0 1 cap m What does the 0 point 0 1 cap m refer to?

A
the concentration of the acid
B
the amount of base present in the acid
C
the strength of the acid
D
the amount of base needed to neutralize the acid
2
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Which of these accurately describes why an acid is strong?

A
An acid becomes strong when it is mixed with a base.
B
An acid is strong when it dissociates completely in water.
C
An acid is strong when it undergoes a reverse reaction.
D
An acid’s strength is due to the amount present in a solution.
3

Which of these refers to the concentration of an acid?

A
a measure of quantity of acid dissolved in water that is designated by molarity
B
an acid that does not dissociate completely when placed in water
C
a compound that accepts protons
D
an intrinsic characteristic of a particular acid related to its dissociation constant
4

Which is true of weak acids and bases?

A
They are unable to react with water.
B
They lose all their properties when in water.
C
They dissociate completely in water.
D
They partially dissociate in water.
5

Which equations shows the complete dissociation of a strong base?

A
HCl rightarrow Cl raised to the negative plus cap h raised to the plus power power
B
HNO sub 2 rightarrow cap h raised to the plus plus NO power sub 2 raised to the negative power
C
BOH plus cap h sub 2 cap o rightarrow cap b raised to the plus plus OH raised to the negative plus cap h power power sub 2 cap o
D
HA plus cap h sub 2 cap o rightarrow cap A raised to the negative plus cap h raised to the plus plus cap h power power sub 2 cap o
6

How does the value of cap k sub A and cap k sub b compare with the concentrations of hydronium ion and hydroxide ion?

A
cap k sub A times cap k sub b is less than open bracket cap h sub 3 cap o raised to the plus power close bracket plus open bracket OH raised to the negative power close bracket
B
cap k sub A times cap k sub b is equal to open bracket cap h sub 3 cap o raised to the plus power close bracket times open bracket OH raised to the negative power close bracket
C
cap k sub A times cap k sub b is greater than open bracket cap h sub 3 cap o raised to the plus power close bracket times open bracket OH raised to the negative power close bracket
D
cap k sub A times cap k sub b is equal to the fraction with numerator open paren cap h sub 3 cap o raised to the plus power close paren and denominator open paren OH raised to the negative power close paren
7

What does it mean for a weak acid to be in equilibrium?

A
At equilibrium there is a small amount of HA and more cap A raised to the negative power and cap h raised to the plus power .
B
At equilibrium there is the same amount of HA , cap A raised to the negative power and cap h raised to the plus power .
C
The acids only slightly dissociate and readily undergo reverse reaction.
D
The position of equilibrium in weak acids lies more to the right than to the left.
8

If hydrofluoric acid is a stronger acid than acetic acid, which statement is most likely true?

A
The conjugate acid of hydrofluoric acid is weaker than that of acetic acid.
B
The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
C
The conjugate acid of hydrofluoric acid is stronger than that of acetic acid.
D
The conjugate base of hydrofluoric acid is stronger than that of acetic acid.
9

A base is added to water. What happens when the position of equilibrium lies to the left?

A
The base is partially dissociating into products.
B
The base is present in very small amounts.
C
The base is not dissociating into any ions.
D
The base is completely dissociating into products.
10

What does it mean for a strong acid to be in equilibrium?

A
The equilibrium lies far to the right so that products are very heavily favored.
B
The equilibrium lies far to the left so that reactants are heavily favored.
C
At equilibrium the products and the reactants are in equal balance.
D
At equilibrium there are a lot of strong acids and very few ions.

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Equilibria of Acids and Bases — Quiz Answers…