science

science

1. Distalation

   • crystallization separates a soluble solid from a solvent but sometimes you need to collect the solvent itself, instead of just letting it evaporate off into the air. For example, some countries purify seawater to obtain unstable water.

2. Filtertration

   • The techniques of filtration is used to separate substances that are unsuitable in a particular soluble in the solvent.

3. crystallization

   • to obtain a sample of pure salt(sodium chloride/NACL-) from the salt solution following filtration separate the sodium (called filtration) from the water. you can do this by evaporating the water from the sodium chloride solution.

4. Compounds

   • -Compounds have a fixed composition.(the ratio of elements present is always the same in any particular compound. -Chemical reactions must be used to separate the elements into a compound. - There are chemical reactions between atoms of different elements in the compounds

5. Mixtures

   • -Mixtures have no fixed compositions (the proportions vary depending on the amount of each substance mixed together. - the different elements or compounds in a mixture can be separated again more easily.(by physical means using the differences in properties of each substance in the mixture.) - There are no chemical bonds between atoms of the different substances in a mixture.

6. Chromatography:

   • this can be used to monitor when new products are formed in reactions and when reacting substances have been used up

7. do you like coffee?

   • When you add water to coffee powdwer yo make a solution. A solution is a mixture of a liquid and a solid or gas. al parts of the mixture are the same . you cant separate substances

8. What colour is your pen?

   • your pen might be blue or red or black or green but as we all know that we have 3 prime colours = RED-BLUE-YELLOW=these 3 colours are used to create the colours f pen if you placed a splash of in on some paper then dip it into some water the colours will bleed up the paper and then you will see all of the colours that were in the pen that made your ink .