Separating Mixtures Flashcards
(7 cards)
1
Q
Aim?
A
To separate a mixture of sand, salt and water
2
Q
Equipment?
A
Filter funnel
beaker
tripod stand
retort stand
evaporating dish
spatula
glass rod
bunsen burner
pair of filter paper
3
Q
Result?
A
The sand was left behind on the filter paper as residue. The salt solution passes through the filter paper as filtrate. Salt is obtained from the salt solution by evaporation.
4
Q
Explain why mixing sugar, grains of barley, and water forms a mixture.
A
Because they are combined chemically
5
Q
What is the purpose of stirring the mixture using the glass rod?
A
To dissolve the salt faster
6
Q
Name the substance formed in the filtrate when it is cooled.
A
Salt
7
Q
Can the method above also be used to separate a mixture of salt and sugar?
A
Yes by using ethanol because sugar dissolves in ethanol
