PTM02- Solutions& Heat

Question 0

What does dissolving mean?

Answer 0

Forming a solution by mixing two or more materials

Mixing materials together does NOT always make a solution!!

Question 1

What is a solution?

Answer 1

A homogeneous mixture

Question 2

What makes something dissolve or not dissolve?!

Answer 2

Attraction!!

Question 3

What is the first step of sugar dissolving in water?

Answer 3

A lump of sugar is dropped into the water

Question 4

What is the second step of sugar dissolving in water?

Answer 4

Sugar molecules begin to break off from the lump

Question 5

What is the third step of sugar dissolving in water?

Answer 5

More and more sugar molecules move away and randomly bounce around

Question 6

What is the final step of sugar dissolving in water?

Answer 6

Eventually, all of the sugar molecules becomes evenly distributed throughout the water

Question 7

What does solvent mean?

Answer 7

The substance that dissolves a solute to form a solution.
There is usually MORE solvent then solute in a solution.
e.x- the water is a solvent in a sugar-water solution

Question 8

What is solute?

Answer 8

The substance that dissolves in a solvent to form a solution

e.x- the sugar is a solute in a sugar-water solution

Question 9

What does soluble mean?

Answer 9

Able to be dissolved in a particular solvent

sugar is soluble in water

Question 10

What does insoluble mean?

Answer 10

NOT able to be dissolved in a particular solvent

Question 11

Look at the attraction among the particles to find out if something is soluble or insoluble

Answer 11

-

Question 12

What is the term called when liquid changes into gas?

Answer 12

Evaporation

Question 13

What is the term called when has changes into liquid?

Answer 13

Condensation

Question 14

What is the term called when solid directly changes to gas?

Answer 14

Sublimation

Question 15

What is the term called when gas directly changes to solid?

Answer 15

Sublimation

Question 16

What is it called when liquid changes to solid?

Answer 16

Solidification (freezing)

Question 17

What is it called when solid changes to liquid?

Answer 17

Fusion (melting)

Question 18

What does dilute mean?

Answer 18

A solution that contains relatively little solute

Question 19

What does concentrated mean?

Answer 19

A solution that contains a lot if solute for the amount of solvent

Question 20

What is a saturated solution?

Answer 20

A solution in which no more solute will dissolve at a particular temperature

Question 21

What is a unsaturated solution?

Answer 21

A solution in which more of the solute could dissolve at the same temperature

Question 22

What is a supersaturated solution?

Answer 22

A solution that contains more solute then would normally dissolve at certain temperature

Question 23

What is solubility?

Answer 23

The limit to how concentrated a solution can become. The mass of a solute that can dissolve in a given amount of solvent to form a saturated solution at a given temperature

Question 24

What are the four factors that can affect solubility and rate (how fast) of dissolving?

Answer 24

Surface Area
Heat
Size of particle
Agitation