What’s a mixture?
Lots of things jumbled up together
What’s an example of a mixture?
Sea water
How is sea water a mixture?
It has:
water
different chemicals
rubbish
seaweed
sand
in it.
Name an example of a chemical in sea water
salt
How can separate seaweed and sand from sea water?
by filtering
How does seaweed and sand get separated by filtering?
They are trapped in the filter paper and water run through it.
Name 3 parts of the filter.
filter paper
funnel
conical flask
what’s the residue?
A solid material trapped in the filter paper.
What’s the filtrate?
A liquid that runs through the filter paper.
What does a soluble substance mean?
A substance that can be dissolved.
What does an insoluble substance mean?
A substance that will not dissolve.
Salt can be separated from sea water by filtering.
T or F
AND WHY?
False
Because salt already dissolved in the water.
What seems to happen when you stir salt into water?
The salt grains disappears.
What really happens to the salt grains when it disappears in the water?
they break down into tiny pieces and mix with the water.
What’s a solution?
A solid dissolved in a liquid.
What’s a solvent
The liquid part in the solution
What’s a solute
the solid part in the solution
What needs to happen so you can taste a substance?
It has to dissolve in the moisture on your tongue.
Can you taste insoluble substances?
no
Tap water is always clean.
T or f
flase
If a liquid is transparent.
it’s a:
Solution
what if the liquid is cloudy or opaque?
it’s not a solution
Water is the only solvent.
True or false
false
Nail varnish
Dissolve in:
does not dissolve in:
propanone
water
