what is olfactory indicator give its example and explain with the help of an acitivity?
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"olfactory indicators" are those indicators that help to identify whether the given solution is acidic or basic by changing their smell instead of colour as other indicators do.
olfactory indicator" implies that this is a compound whose can smell you can detect... vanilla, clove and onion are all olfactory indicators as these do not give their distinct odour in highly alkaline(basic) medium.
Activity :
Aim : To check the olfactory indicator.
Required Materials : 1. Onions 2. Knife 3. Plastic bag 4. Clean clothes. Procedure :
Take some onions and finely chop them.Put the chopped onions in a plastic bag with some clean cloth.Tie up the bag tightly and keep it overnight in the fridge.Observation : Check the odour of the cloth strips.
Result: It is used as the acid indicator.
olfactory indicator" implies that this is a compound whose can smell you can detect... vanilla, clove and onion are all olfactory indicators as these do not give their distinct odour in highly alkaline(basic) medium.
Activity :
Aim : To check the olfactory indicator.
Required Materials : 1. Onions 2. Knife 3. Plastic bag 4. Clean clothes. Procedure :
Take some onions and finely chop them.Put the chopped onions in a plastic bag with some clean cloth.Tie up the bag tightly and keep it overnight in the fridge.Observation : Check the odour of the cloth strips.
Result: It is used as the acid indicator.
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