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Geraldine Davis

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Term1/13
What does equilibrium mean
Definition1/13

Total amounts of products and reactants are not changing.-- Apex

Term1/13
What is the difference between a strong base and a weak base
Definition1/13

A "strong" acid (or base) is one that dissociates completely in dilute aqueous solution. One which does not is a "weak" acid (or base). An acid with a pKa (or a base with a pKb) lower than about -2 is considered to be a "strong" acid.

Weak acids and bases can still be quite corrosive. HF is a "weak" acid with a pKa of around 3.2 (which corresponds to only about one molecule out of every 38 or so being dissociated), but it's pretty terrible stuff and will dissolve even glass.

Term1/13
Which of the following is a strong acid
Definition1/13

HCI (Hydrochloric acid)

Term1/13
What kind of fraction has a value less than 1
Definition1/13

1/2 is less than one.

Term1/13
What would happen if the equilibrium of a weak acid dissociation reaction were upset
Definition1/13

The reaction would shift to balance the change

Term1/13
What is Ka for H2CO3 aq H aq HCO3 aq
Definition1/13

Ka= [h+][HCO3-]/[H2CO3]

Term1/13
How would a drop in pressure affect a gaseous system at equillibrium
Definition1/13

the reaction would shift to favor the side with the most moles of gas

Term1/13
Balance H2 plus N2 equals NH3
Definition1/13

Balance H2 plus N2 equals NH3

3H2 + N2 ----> 2NH3

Term1/13
What will happen when a reactant is added to a system at equilibrium
Definition1/13

The equilibrium of the system will be upset.

Term1/13
A concentration unit expressed in units of moles of solute per kilogram of solvent
Definition1/13

This is called molality.

Term1/13
What is Keq for the reaction N2 plus 3H2 2NH3 if the equilibruim concentractions are NH3 3 M N2 1 M and H2 2 M.
Definition1/13

Keq = 1.125

Term1/13
Which one of the following is an example of a strong base
Definition1/13

sodium hydroxide

Term1/13
which of the following is an example of an Arrhenius acid
Definition1/13

HI

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Cards in this guide (13)
What does equilibrium mean

Total amounts of products and reactants are not changing.-- Apex

What is the difference between a strong base and a weak base

A "strong" acid (or base) is one that dissociates completely in dilute aqueous solution. One which does not is a "weak" acid (or base). An acid with a pKa (or a base with a pKb) lower than about -2 is considered to be a "strong" acid.

Weak acids and bases can still be quite corrosive. HF is a "weak" acid with a pKa of around 3.2 (which corresponds to only about one molecule out of every 38 or so being dissociated), but it's pretty terrible stuff and will dissolve even glass.

Which of the following is a strong acid

HCI (Hydrochloric acid)

What kind of fraction has a value less than 1

1/2 is less than one.

What would happen if the equilibrium of a weak acid dissociation reaction were upset

The reaction would shift to balance the change

What is Ka for H2CO3 aq H aq HCO3 aq

Ka= [h+][HCO3-]/[H2CO3]

How would a drop in pressure affect a gaseous system at equillibrium

the reaction would shift to favor the side with the most moles of gas

Balance H2 plus N2 equals NH3

Balance H2 plus N2 equals NH3

3H2 + N2 ----> 2NH3

What will happen when a reactant is added to a system at equilibrium

The equilibrium of the system will be upset.

A concentration unit expressed in units of moles of solute per kilogram of solvent

This is called molality.

What is Keq for the reaction N2 plus 3H2 2NH3 if the equilibruim concentractions are NH3 3 M N2 1 M and H2 2 M.

Keq = 1.125

Which one of the following is an example of a strong base

sodium hydroxide

which of the following is an example of an Arrhenius acid

HI

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