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Equilibrium

Question
CBSEENCH11006488
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During qualitative analysis, why NH4Cl and NH4OH are added in the III group?

Solution
Due to common ion effect (NH4+ ions), NH4Cl reduces the ionisation of NH4OH. Then hydroxides of III group only (but not of those of IV group) are precipitated.

Some More Questions From Equilibrium Chapter

A crystal of common salt of a given mass is kept in its aqueous solution. After 24 hours, its mass remains the same. Is the crystal in equilibrium with the solution?

What is the role of forward and backward reactions at equilibrium of a reversible reaction?

What is a forward reaction?

What condition favours a reversible reaction?

What is a backward reaction?

What type of equilibrium is attained in a reversibe chemical change?

What is meant by a system at dynamic equilibrium?

discuss the effect of a catalyst on equilibrium ? 

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