need help
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Because, you need either a pH meter or an indicator to tell you when you reach the appropriate point.
If you have a clear solution of NaOH, and you are trying to titrate it to pH 7 with a clear solution of HCl, how can you tell when you get there? Without an indicator (or pH meter), you simply can't.
Indicators are a very easy, very fast way to tell when you have reached a specific pH (depending on which indicator you use).
If you have a clear solution of NaOH, and you are trying to titrate it to pH 7 with a clear solution of HCl, how can you tell when you get there? Without an indicator (or pH meter), you simply can't.
Indicators are a very easy, very fast way to tell when you have reached a specific pH (depending on which indicator you use).
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The colour change indicates the end point of the reaction, or sometimes the half equivalence point,
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How else are you going to know when the titration reaction is over???