Question

write chemistry experiment with AIM - To calculate the molarity and the strength of the given NaOH solution by titrating it against 1/10 M HCl solution​

Answer 1

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Procedure

1. Take a burette and wash it with water.

2. Rinse and then fill the burette with the given sodium hydroxide solution. Clamp it vertically in burette stand.

3. Rinse the pipette with the given oxalic acid solution.

4. Pipette out 20 ml of the oxalic acid solution in a washed titration flask.5. Add 1-2 drops of phenolphthalein indicator into it and place it just below the nozzle of the burette over a white glazed tile.

6. Note down the lower meniscus of the solution in the burette and record it as the initial burette reading.

7. Now run the sodium hydroxide solution slowly and dropwise into the flask till a very faint permanent pink colour is just obtained. Read the lower meniscus of the solution again in the burette and record it as final burette reading.

Observations

Molarity of the given oxalic acid solution = M20

Volume of oxalic acid solution taken for each titration = 20 ml (V1).

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