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The best electrolyte for coagulating A s 2 S 3 sol is

Options

  1. ANaCl
  2. BC u S O 4
  3. CA l N O 3 3
  4. DT h S O 4 2

Correct answer

D. T h S O 4 2

Step-by-step solution

A s 2 S 3 sol has negatively charged sol particles and therefore, positive ions are effective in causing the coagulating of A s 2 S 3 sol. Coagulating efficiencies of electrolytes increase with the increase in the valence of effective ion. Therefore, the best electrolyte for coagulating A s 2 S 3 sol is T h S O 4 2 . N a + < C u 2 + < A l 3 + < T h 4 +

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