The pH values of three solutions A, B, C are given .
Solution A : pH value 12
Solution B : pH value 2
Solution C : pH value 7
Answer the following questions :
(i) Which solution will have no effect on litmus solution.
(ii) Which solution will liberate CO2 when reacted with sodium carbonate.
(iii) Which solution will turn red litmus solution blue.

Question

The pH values of three solutions A, B, C are given .
Solution A : pH value 12
Solution B : pH value 2
Solution C : pH value 7
Answer the following questions :
(i) Which solution will have no effect on litmus solution.
(ii) Which solution will liberate CO2 when reacted with sodium carbonate.
(iii) Which solution will turn red litmus solution blue.

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Answer

(i) Solution C : pH value 7

(ii) Solution B : pH value 2

(iii) Solution A : pH value 12

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The diagram represents the preparation of sodium sulphate salt from dil. H2SO4 acid and sodium hydroxide.

1. Name the apparatus ‘A’.

2. Name the substance ‘X’ placed in ‘A’ and the substance ‘Y’ placed in B.

3. State the reason for conducting the titration using the apparatus ‘A’ and ‘B’.

4. State which solution is transferred to the evaporating dish and evaporated to point of crystallization for obtaining the salt.

5. State why titration is not conducted for the preparation of copper [II] sulphate crystals by neutralization.

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