Question

Give the observation for the practical : To prepare M/10 Sodium Carbonate solution​

Answer 1

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Real Lab Procedure

Preparation of 250ml M/10 (0.1 M) sodium carbonate solution

Using an electronic balance. we’ll first weigh about 2.65g of sodium carbonate crystals in a weighing bottle and transfer these into a 250ml beaker.

Wash the weighing bottle 2 or 3 times using distilled water and transfer all the washings into the beaker. Dissolve the sodium carbonate crystals in the beaker by gentle stirring with a clean glass rod.

When the sodium carbonate crystals in the beaker dissolve completely, transfer the entire solution from the beaker into a 250ml standard flask through a funnel, using a glass rod.

Wash the beaker 2 to 3 times with distilled water and transfer all the washings into the standard flask.

Finally wash the funnel thoroughly with distilled water. This transfers the solution completely into the standard flask.

Using a wash bottle, add enough distilled water to the standard flask so that the level is just below the calibration mark on it. Add the last few drops of distilled water with a pipette until the lower level of the meniscus just touches the mark on the standard flask.

Stopper the measuring flask and shake gently to make the solution uniform throughout.

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