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Sulphites and Bisulphites.

Write the obs...

Question

Write the observations and balanced equations for the following reactions :
Sodium hydroxide is added drop-wise till in excess to a solution of zinc sulphate.

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Solution

When sodium hydroxide solution is added drop by drop to zinc sulphate solution a white precipitate is formed which is soluble in excess of sodium hydroxide.
ZnSO₄ + 2NaOH → Zn(OH)₂ + Na₂SO₄
Zn(OH)₂ + 2NaOH → Na₂ZnO₂ + 2H₂O

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Q. Sodium hydroxide is added drop wise till in excess to a solution of Zinc sulphate. Which of the following observation can be made?

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The balanced equation for the following reaction:

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