Surface Chemistry
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Answer;
The greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
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    Give reason why a finely divided substance is much more effective as an adsorbent. 
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    Why is it essential to wash the precipitate with water before estimating it quantitatively?
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    Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.
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    What is the difference between physisorption and chemisorption?
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