Chpt 8 9th Grade Flashcards Preview

Science > Chpt 8 9th Grade > Flashcards

Flashcards in Chpt 8 9th Grade Deck (29)
Loading flashcards...
1

Law of conservation of matter

Number and types of atoms on the left side must equal the right side

2

Explain how to balance h2 + o2 = h20

2h2 + o2 = 2h20

3

Chemical reactions that give off thermal energy

Endothermic

4

Chemical reactions that absorb thermal heat

Endothermic

5

4 factors that affect the rate of reaction

Increased temperature
Increased concentration
Increased surface area (by making proteins smaller)
Catalysts (compound that affects rate of reaction but doesn't take place in reaction)

6

4 types of chemical reactions

Combination
Decomposition
Single displacement
Double displacement

7

Combination

2 or more smaller molecules combine to make one large one

8

Decomposition

1 larger molecule breaks down into 2 or more smaller pieces

9

Single displacement

To move and set apart
AB+C=AC+B

10

Double displacement

2 set apart/change
AB+CD=AC+BD

11

Acids?

Chemicals that will produce or donate a hydrogen ion(H+)
When they are placed in water they decompose

12

Bases?

Also called alkalines they are the opposite of acid and they are a compound that provides hydroxide ions(OH-)
Caustic (basic)

13

Acid + Base =

Salt + Water

14

The neutral of the pH scale

7-pure water

15

Explain indicators

It is a compound that changes it's Mccullar shape based on its acid-base environment and then produces a color change because I can't absorb different colors

16

Explain end points

It is the pH value where the indicator changes color

17

Organic chemistry

Compounds that contain carbon

18

Hydrocarbons

Molecules that only have hydrogen and carbon
Carbon needs 4 bonds, hydrogen needs 1

19

1-5 for carbon names

1. Meth
2.eth
3.prop
4.but
5.pent

20

6-10 for carbon names

6. Hex
7. Hept
8. Oct
9. Non
10. Dec

21

Names for single, double, and triple bonds

Single- alkANE
Double-alkENE
Triple-alkYNE

22

Isomer

2 molecules of the same compound with a different shape

23

Cyclo is when a carbon compound is ???
What is the name of the different way scientists draw these

In the shape of a circle
Aromatic compound

24

Propanoic acid

When there's an O and OH coming off of a compound
(See notes)

25

Alcohols

Have -OH coming off and end in "nol"

26

Explain how soaps work

Since like dissolves like water alone cannot dissolve fat and grease so when you put soap into the water the nonpolar end of the soup dissolves the nonpolar fat
These large molecules of fat emulsify into small molecules

27

Polymer

Long chains of repeating chemical structures

28

Esters

Have O coming off

29

The rearranging or recombining of atoms or molecules to form new substances

Chemical reaction