Question:medium

A 2 kg water sample contains 408 mg of $CaSO_{4}$ (M.wt=136). The hardness in terms of $CaCO_{3}$ equivalents (in ppm) is

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Hardness (ppm) is the mg of $CaCO_{3}$ equivalent per 1 kg of water. Always divide by the sample weight if it's not 1 kg.
Updated On: Jul 4, 2026
  • 100
  • 136
  • 150
  • 204
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The Correct Option is C

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