a student prepare 2 solution one dilute HCl and second distilled water and separatist you see forget to label the tubes both solutions are colourless solution of Litmus phenolphthalein and lime water are available to her that how will see distinguish between the two solutions
Answers
She can add lime water to litmus first. Because it is basic in nature the colour of litmus will also become blue colour. Then she can add solution 1. There are two possibilities.
Possibility 1 - The colour remains blue only ( colour does not change)
The solution 1 is distilled water and the other solution 2 is the diluted hydrochloric acid
Possibility 2 - The colour slowly turns crimson ( a violet-like shade of reddish colour) or reddish in colour.
This solution 1 is dilute hydrochloric acid and the other solution 2 is distilled water
The reason why the litmus did not turn fully red is because the acid is diluted. If it would be concentrated form of strong hydrochloric acid, the nit would quickly turn a deep red shade.
As for the other materials, like phenopthalein and the left over litmus indicator and lime water can be used to determine it in other methods.
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