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We will separate salt and sand. Using?
Using a sieve. OK, that’s enough. Do you guys have a mixture
of salt and sand? No.
How do you make it a mixture? And stir.
OK. Let’s see if you can separate by sieving. Pour all of the mixture.
Did it fully separate the sand from the salt? No.
So, what do you guys think you should do to separate them?
Use a filter. OK. Let’s see you use a filter.
What’s the first thing that you will do? Add water.
Will you add water directly on the paper towel? No.
Just take it from here and put it in there. What do you need now?
Add water. Please add some water.
Now what will happen to it? A solution.
What will make a solution? The water and the salt.
Now what will you do to separate them? Use a filter.
Ok. Let’s see you use a filter.
So what happened? The filter separated the sand and salt solution.
Ok, let’s look here. What’s here at the top?
Sand. Good, and what’s here at the bottom?
The salt solution. What is the process that you used?
Filtration. And what is the apparatus you used? This paper
thing. A filter.
Why would a sieve not work? Because sieve can separate two solids.
The sands and salts are little.