Question

Q-13 Solution A gives red color when a drop of methyl orange is added to it. On
the other hand, solution B gives pink color when a drop of phenolphthalein
indicator is added to it. What type of solutions are A and B? What is the pH
value of A and B?
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Answer 1

Answer:

Explanation:

Solution A gives pink color when a drop of phenolphthalein indicator is added to it, hence, it is a basic solution and pH range in between 9-10. Solution B gives red color when a drop of methyl orange is added to it, hence, it is an acidic solution and pH range in between 4-6. Therefore, solution A has higher pH value.

Answer 2

✝️ Your Answer:

$\large{ \bold{ \underline{ \underline{ \pink{Solution \: A}}}}}$

Given, Solution A gives red colour when methyl orange is added to it. Here, Methyl orange is a synthetic or laboratory indicator which shows change in colour in Acids and bases. This helps us in recognising the nature of any solution. ✏ Refer to the attachment... So, from the table, we can see that Methyl orange changes into red in acidic solution. Hence, Solution A Is acidic in nature.

PH of acid ranges between 0-6. So, the PH of Solution A is between 0-6.

$\large{ \bold{ \underline{ \underline{ \pink{Solution \: B}}}}}$

Given, Solution B gives pink colour when phenopthlaein is added to it. Here, Phenopthalein is again a synthetic indicator which changes colour in acids and bases. ✏ Refer to the attachment... So, from the table, we can see that Phenopthalein changes into pink in basic solution. Hence, Solution B is basic in nature.

PH of base ranges between 8-14. So, the PH of Solution B is between 8-14

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