3E - week 36

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 3

0

Which hazard symbols (GHS-symbols) did you see during the video?

1. explosive
2. toxic
3. flammable
4. harmful

Drag all text blocks to the right graph.

Pure substance

Mixture

Melting Point

Boiling Point

Boiling Range

Melting Range

How many liters of water should you add to 125 mL hydrochloric acid with a pH of 3,0 in order to obtain a solution with pH 4,0. (answer in 2 decimals)

What can consist of one kind of molecule?

1. emulsion
2. solvent
3. solution
4. suspension

There are 6 phase transitions. Put the correct description next to each of 6 phase transitions

g → l

s → l

s → g

l → s

l → g

g → s

solidification / freezing

melting

evaporation

condensation

deposition

sublimation

Filtration is suitable for...

1. homogeneous mixtures
2. heterogeneous mixtures

Draw a cross section of the filtration when separation a suspension of sand and water.

Filtration of sand and water.

Residue: zand

Filtrate: water

Drag the name of the mixtures to the most suitable separation method.

filtration

extraction

evaporation

coffee grounds in coffee

stain in trousers

drying wet hair

Drag the name of the mixtures to the most suitable separation method.

filtration

extraction

evaporation

adsorption

blue colour in spirit

coffee grounds in coffee

stain in trousers

drying wet hair

Type the question you made in preparation for the test in the test week?