22. If sugar is placed on a dusty surface of water, dus

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22. If sugar is placed on a dusty surface of water, dust
going near him. How can this be explained?

Additional information

Questions and problems from the manual:
"Laboratory Workshop on Colloid Chemistry" Nekrasov AP, Veretenchenko BA, Kharkov NTU "KhPI", 2004
"Characteristic properties of disperse systems" Nekrasov AP, Kharkov, 1996
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