Unit 7.4 and important questions 7.3

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

CH3OH is a

1. metal
2. salt
3. molecular substance

MnO2 is a

1. metal
2. salt
3. molecular substance

H2SO4 is a

1. metal
2. salt
3. molecular substance

Au is a

1. metal
2. salt
3. molecular substance

Question 18

Question 19

Question 20

Question 21a

Question 21b

1. dissolves in water
2. does not dissolve in water

Question 22

Question 24

Question 25

Question 26

Question 27

1. Sodium has to many
2. Sodium has to little
3. Sodium does not have it
4. Sodium is still developing it

Question 28a

1. molecular substance non-decomposable
2. molecular substance, decomposable
3. salt, non-decomposable
4. salt, decomposable

Question 28b

Question 28c

1. Yes, you need light
2. No, you need O2
3. Yes, you get 2 or more reaction products
4. No, you have two reactants

Question 28d

1. To prevent it from clotting
2. To keep the process visible
3. To provide light
4. To make sure algae increase in numbers

Question 28e

1. odour
2. food acid
3. preservative against yeast
4. colourant

Question 28f

1. A
2. B
3. C
4. D

Question 28g

1. C2H6OH
2. C2H5O
3. C2H6O
4. C2H4OH

Question 28h

1. acid rain
2. smog
3. green house effect
4. flouding

Question 29a

1. adhesion
2. solubility
3. boiling point
4. particle size

Question 29b

1. solvent
2. rinsing agent
3. cleaner
4. eluent

Question 29c

1. a-c-b-d
2. b-a-d-c
3. d-b-a-c
4. c-b-d-a

Question 29d

Question 29e

1. hydrophilic, tails are hydrophilic
2. hydrophilic, tails are hydrophobic
3. hydrophobic, tails are hydrophilic
4. hydrophobic, tails are hydrophobic