Page 138 - Chemistry

5. Phenolphthalein indicator
6. Methyl orange indicator
7. Universal indicator
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8. Solution a 100cm
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9. Solution b 100cm
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10. Solution c 100cm
11. Distilled water in wash bottle
12. 0.2m CuSO 4 (solution Y)
13. 0.7g zinc powder (solid Z)
14. Thermometer
15. 100ml plastic beaker
16. Stop watch or wrist watch
17. Tissue paper ½ metre
18. 6 test tubes
19. One boiling tube
20. Solid P
21. Solid Q
22. Filter paper
23. Means of heating
24. 2m NaOH
25. 2m H 2SO 4
26. 0.1m bacl 2
27. 0.1m pb(no 3) 2
28. 2m HCl
29. 2m NH 3(aq)
30. Metallic spatula
31. 0.5g NaHCO 3
Notes on preparation of solutions :-
 Solution A 0.05M sodium Carbonate
 Solution B = 0.1M of HCl
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 Solution C = 0.16g KOH + 1.94g KCl in 250cm solution
 Solid P = CaCl 2 and MgCO 3
 Solid Q = Carboxylic acid (oxalic)

1. You are provided with:-
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 Solution A containing 0.05 moles in 1dm of solution of anhydrous Sodium Carbonate
 Solution B, monobasic acid, HX
 Solution C, 2.1g of a mixture of potassium hydroxide (KOH) and potassium chloride (KCl)
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dissolved in distilled water and made up to 250cm solution.
You are required to:
(a) Standardise the monobasic acid, solution B
(b) Determine the percentage of potassium chloride (KCl) in the mixture.
Procedure:
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Fill the burette with solution B. Pipette 25.0cm of solution A into a clean dry conical flask
and titrate with solution B using methyl orange indicator. Record your results in table 1 below:-

1 2 3
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Final burette reading (cm )
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Initial burette reading (cm )
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Volume of solution B used (cm )

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