all practicles

Question 1

Making Salts

Question 2

Neutralisation

Question 3

electrolysis

Question 4

temperature changes

Question 5

rates of reaction

Question 6

chromotography

Answer 6

1. Use a ruler to draw a horizontal pencil line 2 cm from the bottom short edge of the
   chromatography paper- origin line
2. add a spot of ink to the line and place the sheet in a beaker of solvent eg. water
3. add the piece of paper into the water with only the bottom submerged eg. 1cm
4. clip the top to a wooden spill resting on the top of the beaker
5. put a lid on top to stop the solvent evaporating
6. the solvents seeps up the paper carrying the ink with it
7. each dye in the ink will move up the paper at different rates forming a spot
8. if any ink is incoluable it will stay on the baseline
9. when the solvent has nearly reached the top of the paper take it out and dry it out
10. the end result is a chromotogram
    analysis(8):
11. measure the distance traveled by the solvent
12. measure the distance in mm between the centre of the spots of dyes and the base line
13. calculate the Rf = distance travelled by substance/distance travelled by solvent
14. compare the ratios of the different dyes

Question 7

identifying ions

Question 8

water purification