Chpt 8 9th Grade Flashcards Preview

Science > Chpt 8 9th Grade > Flashcards

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

Law of conservation of matter

A

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

2
Q

Explain how to balance h2 + o2 = h20

A

2h2 + o2 = 2h20

3
Q

Chemical reactions that give off thermal energy

A

Endothermic

4
Q

Chemical reactions that absorb thermal heat

A

Endothermic

5
Q

4 factors that affect the rate of reaction

A

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
Q

4 types of chemical reactions

A

Combination
Decomposition
Single displacement
Double displacement

7
Q

Combination

A

2 or more smaller molecules combine to make one large one

8
Q

Decomposition

A

1 larger molecule breaks down into 2 or more smaller pieces

9
Q

Single displacement

A

To move and set apart

AB+C=AC+B

10
Q

Double displacement

A

2 set apart/change

AB+CD=AC+BD

11
Q

Acids?

A

Chemicals that will produce or donate a hydrogen ion(H+)

When they are placed in water they decompose

12
Q

Bases?

A

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

13
Q

Acid + Base =

A

Salt + Water

14
Q

The neutral of the pH scale

A

7-pure water

15
Q

Explain indicators

A

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
Q

Explain end points

A

It is the pH value where the indicator changes color

17
Q

Organic chemistry

A

Compounds that contain carbon

18
Q

Hydrocarbons

A

Molecules that only have hydrogen and carbon

Carbon needs 4 bonds, hydrogen needs 1

19
Q

1-5 for carbon names

A
  1. Meth
  2. eth
  3. prop
  4. but
  5. pent
20
Q

6-10 for carbon names

A
  1. Hex
  2. Hept
  3. Oct
  4. Non
  5. Dec
21
Q

Names for single, double, and triple bonds

A

Single- alkANE
Double-alkENE
Triple-alkYNE

22
Q

Isomer

A

2 molecules of the same compound with a different shape

23
Q

Cyclo is when a carbon compound is ???

What is the name of the different way scientists draw these

A

In the shape of a circle

Aromatic compound

24
Q

Propanoic acid

A

When there’s an O and OH coming off of a compound

See notes

25
Q

Alcohols

A

Have -OH coming off and end in “nol”

26
Q

Explain how soaps work

A

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
Q

Polymer

A

Long chains of repeating chemical structures

28
Q

Esters

A

Have O coming off

29
Q

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

A

Chemical reaction