A white solid is either Na₂O or Na₂O₂. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of the white solid. (i) Identify the substance and explain with balanced equation.(ii) Explain what would happen to the red litmus if the white solid were the other compound.
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☆ Na20 is sodium oxide (or disodium monoxide).
Its reaction with water is as follows:
sodium oxide + water → sodium hydroxide
Na2O + H2O → 2 NaOH(aq)
☆Na2O2 is sodium peroxide.
Its reaction with water is as follows:
Sodium peroxide + water → sodium hydroxide + hydrogen peroxide
Na2O2 + 2 H2O ---→ 2 NaOH(aq) + H2O2(aq)
The fact that litmus paper goes white show that it has been bleached.
Hydrogen peroxide is a bleach.
The substance must be SODIUM PEROXIDE, Na2O2
▪▪》If it were sodium oxide, only sodium hydroxide would have been formed.
The red litmus would have been turned BLUE
Thnqss
@mannat
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