Topics 1-6

Question 1

Dissociation

Answer 1

The separation of ions that already exist in a solution. Dissociation occurs for some ionic compounds when the compound breaks into individual ions when in an aqueous solution. As a result, it is an electrolyte and can conduct electricity.

Question 2

Ionization

Answer 2

Ionization occurs for molecular compounds that are acids. The compound breaks into ions that can conduct electricity. An example would be HCl.

Question 3

Dissolving

Answer 3

The separation of compounds from each other in solution.

Question 4

How is it determined if a ionic compound is soluble?

Answer 4

We can check the solubility table, and usually group one ions and ammonium are part of soluble ionic compounds.

Question 5

Determine the solubility of magnesium hydroxide.

Answer 5

Mg(OH)2 (s)
insoluble as the state remains solid in water

Question 6

Determine the solubility of sodium carbonate.

Answer 6

Na2Co3 (aq)
Soluble in water, sodium is also a group one ion, which are usually soluble when in compounds

Question 7

When the solubility of of a solute is greater than 0.1mol/L, what is it?

Answer 7

very soluble

Question 8

When the solubility of a solute is less than 0.1mol/L, what is it?

Answer 8

slightly soluble

Question 9

TRUE OR FALSE:
Compounds with nitrates are insoluble.

Answer 9

False, all compounds with nitrates are soluble.

Question 10

TRUE OR FALSE:
All compounds containing Na, K, or NH4+ are soluble.

Answer 10

True, sodium and potassium are group one ions and ammonium are considered to be soluble when in compounds.

Question 11

What kinds of reactions will produce electrolytes?

Answer 11

Ionization: molecular compounds that are acids
Dissociation: ionic compounds

Question 12

Electrolytes

Answer 12

A substance in an aqueous solution that is capable of conducting an electric charge. They must form ions. A conductivity probe can be use to test aqueous solutions.

Question 13

What do weak electrolytes have?

Answer 13

Some ions, some molecules

Question 14

What do strong electrolytes have?

Answer 14

Lots of ions

Question 15

TRUE OR FALSE:
Ionic compounds are more soluble in polar solvents.

Answer 15

True, but for this unit we are primarily focusing on ionic compounds in water.

Question 16

State the Arrhenius Theory for acids:

Answer 16

A molecular compound that ionizes in water to produce hydrogen ions.

Question 17

State the Arrhenius Theory for bases:

Answer 17

An ionic compounds that dissociates in water to produce hydroxide ions.

Question 18

Is NaOH (s) a base?

Answer 18

Yes, it is a metal hydroxide, a base, that dissociates in water.

Question 19

Explain most molecular compounds in a solution.

Answer 19

Molecular compounds that are not acids do not break into ions when in a solution. Molecular compounds are molecules held together by intermolecular forces and are non-electrolytes.

Question 20

Miscibility

Answer 20

The ability for liquids to dissolve in other liquids.

Question 21

State what happens to soluble molecular compounds?

Answer 21

When molecular compounds dissolve, the molecules separate so a change in state occurs.

Question 22

Insoluble molecular compounds

Answer 22

For insoluble molecular compounds, the molecules do not separate, so there is no change in state.