Get the Answers here Form 4 End Term 1 Exams 2023 Questions and Answers
Requirements for candidates
In addition to the apparatus and fittings found in a Chemistry laboratory, each candidate will require the following.
- about 100cm3 of solution F
- about 50cm3 of solution G
- 30cm3 of solution M
- 30cm3 of solution N
- one burette 0 – 50ml
- one pipette 25ml
- two conical flasks
- 100ml measuring cylinder
- 200ml or 250ml beaker
- About 500ml distilled water
- Phenolphthalein indicator
- thermometer ( 0 – 110C)
- Source of strong heat (preferably Bunsen burner)
- clock or stop watch
- 2 boiling tubes
- one CLEAN METALLIC spatula
- 6 clean dry test-tubes
- one test-tube holder
- at least 6cm length of universal indicator paper
- 0.5g of sodium hydrogen carbonate
- pH chart pH 1 – 14
- Bromine water supplied with a dropper
- 0.5g of solid K – oxalic acid.
- 0.5g of solid P – Sodium sulphite
The students should have access to the following
- 2.0M NaOH solution with a dropper
- 1.0M barium nitrate solution with a dropper
- Bromine water with a dropper
- Acidfied potassium manganate (vii) with a dropper
- 2.0M HCl with a dropper
- Bromine water is prepared by adding 1ml of liquid bromine to 100cm3 of distilled water and shaking thoroughly in a fume cupboard.
- Acidified potassium permanganate is prepared by adding 3.16g of solid potassium permanganate to 400cm3 of 2M sulphuric acid and diluting to one litre of solution using distilled water.
- Solution M is made by dissolving 12.6g of oxalic acid in 400cm3 distilled water and making it to 1 litre.
- Solution N is prepared by dissolving 3.16g of potassium manganate (VII) in 200cm3 of 2M sulphuric acid and adding more water to make 1 litre
- Solution F is prepared by dissolving 4g of sodium hydroxide pellets in about 800cm3 of distilled water and diluting it to one litre solution.
- Solution G is prepared by dissolving 9.0g of oxalic acid (ethan-1,2-dioic acid) in 200cm3 of distilled water and diluting it to 250cm3 solution.