Why sodium carbonate extract is prepared not potassium?
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This question was asked by an examiner during one of my vivas in my final year and answer to this question fetched me cent percent mark in my practicals.
Sodium carbonate extract aka Soda extract is prepared during qualitative analysis of anions present in the given salt mixture. Generally if the given compound is insoluble in water we prepare soda extract. Soda extract gives an expedient way of bringing all the anions of the sample into solution. Otherwise they might be insoluble and couldn’t carry out the experiment properly. Also it prevents the cation in interfering.
Advantages of preparing sodium carbonate extract:-
The preparation of sodium carbonate extract affords a convenient method for bringing the anions of the mixture into solution which were otherwise insoluble with caution of salt.
It removes the basic radical (usually coloured) which interferes in the usual tests of some of the acidic radicals.
The residue can be used for the tests of basic radicals of I to VI groups. Such a solution does not involve the problem of removing interfering radicals like oxalate, fluoride, borate and phosphate.
It is important that your Na2CO3 extract is clear and colourless as this provides a better setting to observe formations of precipitates, colour changes which take place during the experiment.Sodium carbonate extract is slightly basic.
Sodium carbonate extract aka Soda extract is prepared during qualitative analysis of anions present in the given salt mixture. Generally if the given compound is insoluble in water we prepare soda extract. Soda extract gives an expedient way of bringing all the anions of the sample into solution. Otherwise they might be insoluble and couldn’t carry out the experiment properly. Also it prevents the cation in interfering.
Advantages of preparing sodium carbonate extract:-
The preparation of sodium carbonate extract affords a convenient method for bringing the anions of the mixture into solution which were otherwise insoluble with caution of salt.
It removes the basic radical (usually coloured) which interferes in the usual tests of some of the acidic radicals.
The residue can be used for the tests of basic radicals of I to VI groups. Such a solution does not involve the problem of removing interfering radicals like oxalate, fluoride, borate and phosphate.
It is important that your Na2CO3 extract is clear and colourless as this provides a better setting to observe formations of precipitates, colour changes which take place during the experiment.Sodium carbonate extract is slightly basic.
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Answer:
Explanation:
Barium chloride and potassium carbonate react to form barium carbonate and potassium chloride
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