Chemistry
Using a platinum wire, conc. hydrochloric acid and a bunsen burner how would you distinguish between the three salts i.e., sodium chloride, potassium chloride and calcium chloride. Explain in brief the method used for the same.
Answer
We can distinguish between the three salts with the help of flame test as described below:
Method
- Thin platinum wire is thoroughly cleaned and then heated in a non-luminous flame of a burner.
- When the wire imparts no colour it is dipped in conc. HCl and then into the substance to be identified.
- The wire is then reintroduced into the non luminous flame and the colour imparted is noted.
Observation —
- The golden yellow flame confirms the presence of sodium [Na1+] ion.
- Lilac colour of flame confirms the presence of Potassium [K1+]
- Brick red colour of flame, confirms the presence of Calcium [Ca2+] ion.
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