Deck 3

Question 1

What is a solution?

Answer 1

A homogeneous mixture where one substance has been dissolved in another substance

Question 2

Is a solution a homogeneous or heterogeneous mixture?

Answer 2

homogeneous mixture

Question 3

In a solution, what is the name for the substance being dissolved?

Answer 3

Solute

Question 4

In a solution, what is the substance called in which the solute is dissolved?

Answer 4

Solvent

Question 5

Why can more salt be dissolved in hot water that in cold water?

Answer 5

B/c when a liquid is warmed, its molecules move more quickly and that will dissolve the salt more quickly

Question 6

If you want sweet iced tea, would it be better to add the sugar before or after you cool the tea?

Answer 6

Before you cool the tea

Question 7

What is a suspension?

Answer 7

A mixture in while one or more substances are immiscible

Question 8

What does immiscible mean?

Answer 8

It means the one substance won’t mix with another (Water/oil)

Question 9

What is an emulsifier?

Answer 9

A substance that helps to keep particles in suspension

Question 10

What is a colloid?

Answer 10

A suspension with very tiny particles suspended in it

Question 11

What would happen to the mayonnaise if the egg yolk were left out of the recipe?

Answer 11

Then mayonnaise would begin to get chunky

Question 12

How is a suspension different from a true solution?

Answer 12

True solutions are homogeneous mixtures while suspensions are heterogeneous mixtures

Question 13

What is solubility?

Answer 13

The measure of how much solute can be dissolved in a given amount of solvent

Question 14

What are the three factors that most affect solubility?

Answer 14

Temperature, pressure, polarity

Question 15

What is Precipitate?

Answer 15

The name given to particles that come out of a saturated solution

Question 16

Why are soft drinks canned or bottles at low temps and high pressures?

Answer 16

So that there will be more fizz

Question 17

Why do soft drinks eventually go flat once opened?

Answer 17

B/c gas escapes through the opening

Question 18

If no additional sugar has been added to a saturated solution of sugar water, what can you conclude about the temp and/or pressure if you notice sugar beginning to settle on the bottom of the cup?

Answer 18

It is saturated b/c the water cannot dissolve any more of the sugar; The temp dropped

Question 19

What are the main ingredients of soft drinks?

Answer 19

Water, corn syrup, carbonation

Question 20

What is the most popular drink in the United States? The second most popular?

Answer 20

Water, soda

Question 21

What are the two most popular sweeteners used in soft drinks?

Answer 21

Corn syrup, aspartame

Question 22

Why are recipes for soft drinks considered top secret?

Answer 22

So that no other company can copy the recipe

Question 23

What is a dilute solution?

Answer 23

A solution when there is a small amount of solute in it

Question 24

What is a concentrated solution?

Answer 24

If a solution has a large amount of solute in it

Question 25

How does the concentration of a solution affect its boiling point?

Answer 25

When you increase the concentration, you increase the boiling point

Question 26

How does the concentration of a solution affect its freezing point?

Answer 26

When you decrease the concentration, you decrease the freezing point

Question 27

Why is a quantitative observation for concentration usually more useful than a qualitative observation?

Answer 27

B/c a quantitative observation is necessary to enable scientists to be able to repeat results of experiments

Question 28

What is the most common solution on Earth?

Answer 28

Seawater

Question 29

What are the main substances found in the ocean besides water?

Answer 29

magnesium, bromine, sodium, chloride

Question 30

How does salt get into the ocean?

Answer 30

When it rains, water falls onto the surface of the earth, the water dissolves many minerals that are found on the ground which get carried into the ocean by streams, rivers etc....

Question 31

Name one gas that is dissolved in the ocean water.

Answer 31

oxygen

Question 32

Why is seawater saltier than water in rivers and lakes?

Answer 32

b/c seawater has salt in it