what are olfactory indicators
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What Are Olfactory Indicators? An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. Olfactory indicators can be used in the laboratory to test whether a solution is a base or an acid, a process called olfactory titration
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Those substances whose smell (or odour) changes in acidic or basic solution are called olfactory indicators onion and vanilla extract are olfactory indicators.
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