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  1. Thanks for your reply. Some friends at a...

    Thanks for your reply. Some friends at a chemistry lab sent me this that walks me through each step:

    Total hardness is defined as the sum of the calcium and magnesium cation concentrations,...
  2. If I have mg/L of Hardness (CaCO3) , can I calculate mg/L of Calcium?

    I have 100 mg/L of CaCO3, can I calculate mg/L of Calcium? If so, what are the steps?
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