Page 154 - Chemistry

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1. (i) Dissolve solid M in 15cm of distilled water. Divide the resulting solution into six portions.
Record your observations
(ii) Add 3-4 drops of Lead nitrate to the first portion
(iii) Add 3-4 drops of Barium nitrate solution to the second portion
(iv) Add 3-4 drops of sodium hydroxide solution to the third portion
(v) Dip a glass rod into the fourth portion. Heat the end of glass rod dipped into the solution
in a non-luminous flame
(vi) Add 4 drops of acidified manganate (VII) to the fifth portion and warm the mixture

Q3.
1. Solid Y-1spatulaful
2. Solid Z-1spatulaful
3. 6 test tubes
4. 1 red + 1blue litmus papers
5. Metallic spatula
6. pH paper
3. (a) You are provided with solid Y

You are required to:
(i) Carry out the test described below on solid Y
(ii) Record your observations and inferences
(iii) Test for any gas (es) produced

Procedure-
(i) Place a spatula of solid Y into a boiling
3
(ii) Add about 15cm of distilled water and shake well
(iii) Divide the resulting solution into five portions
(iv) Use a universal indicator paper to test portion one of the solution
(v) Add a spatula of sodium carbonate to the second portion
rd
(vi) Add three drops of Potassium manganate (VII) solution to the 3 portion
th
(vii) Add three drops of bromine water to the 4 portion. Warm the mixture if necessary
3
(viii) Place 2cm of ethanol in a test-tube. Add 2 drops of concentrated Sulphuric (VI) acid
and then a spatula end full of solid Y. Shake well and warm the mixture carefully, pour
3
the warm mixture into 25cm of cold water in a beaker and note the smell

MUMIAS DISTRICT

CONFIDENTIAL
INSTUCTIONS.
In addition to the apparatus and fittings found in the laboratory each candidate should have:
1. One 25ml pipette
2. One 3-way pipette filler
3. One 0-50m/s Burrette
4. Two 250m/s conical flask
5. One 100ml measuring cylinder
6. One 100ml glass beaker
o
o
7. One thermometer (-10 C to 110 C)
8. One stop watch / clock
9. One label
10. One 10m/s measuring cylinder
11. White tile
12. 250ml beaker

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