Science Unit A: Section 2.0 Flashcards Preview

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Flashcards in Science Unit A: Section 2.0 Deck (20):
1

What is a mixture?

A mixture that has 2 or more substances
Ex. Soul

2

What is a mechanical or heterogenous mixture?

When you can see the different parts of a mixture

3

What is a solution or a homogenous mixture?

When you can't see the different substances

4

What is a suspension?

A heterogenous mixture where the to substances float

5

What is a colloid?

A heterogenous mixture that needs an emulsion or else the particles will set because they are not bonded together

6

What is a paper chromatography test for?

A paper chromatography test can be used to determine if they are pure substances or solutions

7

What is the solute?

The substance that dissolves

8

What is the solvent?

The substance that does the dissolving

9

What is concentration?

It tells you the amount of solute dissolved in a specific amount of solvent

10

What is an unsaturated solution?

When a solute can still dissolve

11

What is a saturated solution?

When no more solute can dissolve

12

What is solubility?

The maximum amount of solute you can add to a fixed volume of solvent

13

What is an aqueous solution?

It means that the solvent is water

14

The solubility of solids and liquids increases as the...?

Temperature of the solvent increases

15

The solubility of a gas...?

Decreases as the temperature increases

16

The chart?

Matter
/ \
Mixtures P.S
/ | \
Mechanical mixtures
Ex. Soul
Solution
Ex. Vinegar
Suspensions
Ex. Tomato juice
Colloids
Ex milk

17

What are the for parts to the particle model of matter?

•All matter is made of tiny particles
•The tiny particles are always moving
•The particles may be attracted or bonded together
•The particles have spaces between them

18

What factors affect the rate of dissolving?

•Temperature of the solvent
•size of the pieces- because they have more surface area for the particles to bump into
•Stirring so the particles bump into each other

19

What is a pure substance?

A substance that is made of one type of matter
Ex. Tinfoil

20

Why do substances dissolve?

Some particles may be more attracted to each other