Water Treatment and Hardness Quiz
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Questions and Answers

What is the property of water that prevents lather formation with soap?

  • Conductivity
  • Alkalinity
  • Soap consuming capacity (correct)
  • Viscosity

    • Which ions in water react with sodium salts of soap to form insoluble scum?

  • Sodium and chloride ions
  • Calcium and magnesium ions (correct)
  • Potassium and sulfate ions
  • Iron and zinc ions

    • How is temporary hardness of water also known?

  • Sulfate hardness
  • Phosphate hardness
  • Chloride hardness
  • Carbonate hardness (correct)

    • Which process can remove permanent hardness of water?

    <p>Ion exchange process</p> Signup and view all the answers

    What type of scum is formed when calcium and magnesium ions react with sodium salts of soap?

    <p>Calcium stearate</p> Signup and view all the answers

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