At mixture of table salt with sugar loose mix in which it is impossible to allocate where one and where other substance turns out. Process of division of the elements which are a part of a homogenous mixture is based on their recrystallization. Therefore and it is possible to divide them only by chemical methods.
It is required to you
- - spirit-lamp with a support;
- - filter;
- - porcelain capacity.
Instruction
1. To emit salt from mix, prepare water solution. In other words, dissolve sole-sugar mix in water. It needs to be passed at once via the filter to remove all impurity insoluble in water.
2. The next stage – pour the received solution in a cup, it is desirable porcelain as it is chemically neutral.
3. Then place a cup on a ring of a support and begin to heat its bottom by means of a spirit-lamp. So you will achieve evaporation of water and reduction of volume of solution.
4. In process of water evaporation, solution will become more concentrated, you need to be extremely attentive at this moment. As soon as concentration becomes optimum, on walls of a cup kristallik will begin to appear is and there will be a salt in pure form.
5. With the advent of crystals the heating needs to be stopped, and to cool solution. As soon as you make it, salt will be cooled and crystallizes too. Now take the filter and separate salt crystals from solution.
6. Now be engaged in sugar. It remained in a cup, dissolved in water – a peculiar syrup. Filter it carefully – on the filter there will be salt kristallik, and sugar will remain in water solution. You can use it as additive in tea or for pastries – in it there will be no salt.
7. If sugar is not necessary to you, and your purpose is to receive salt, it is possible to dissolve mix from sugar and salt in alcohol (ethanol). Take 100 ml of ethanol, place mix there and carefully mix. The feature of alcohol is that it does not dissolve salt – it will remain on a surface.
8. By means of the filter filter solution – all salt of their mix will remain on the filter. Dry up it – and you can use for designated purpose.