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Ram can see the purple colour of an acid...

Ram can see the purple colour of an acidic indicator below `pH=5.5` only and the blue colour only above `pH=8.50` .How many times that of acidic form, must the concentration of the basic form at least be for Ram to see the end point of titration of `HCl` with `NaOH`?

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To solve the problem, we need to determine how many times the concentration of the basic form of the indicator must be compared to the acidic form for Ram to see the endpoint of the titration of HCl with NaOH. ### Step-by-Step Solution: 1. **Identify the pH range for the indicator:** - The acidic indicator shows purple color below pH 5.5. - The same indicator shows blue color above pH 8.50. - Therefore, the change in pH (ΔpH) is: ...
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