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Given: pH=7.1TotalAlkalinity=203mg/L"asCaCO3TotalHardness=297mg/L"asCaCO3CalciumHardness=235mg/L"asCaCO3" The following guidelines for adding lime soda softening process chemicals are adapted from Nazaroff and Alvarez-Cohen, 2001. \begin{tabular}{|l|l|l|} \hline Condition & Ca(OH)2(mg/LasCaCO3)required(seefootnote) & Na2CO3(mg/LasCaCO3)required \\ \hline If: & Total Hardness +Mg2++H2CO3+62.5 & None \\ \hline TotalhardnessAlkalinitytotal & & \\ \hline If: & Total Alkalinity +Mg2++H2CO3+62.5 & Non-carbonate hardness \\ \hline Totalhardness>Totalalkalinity & & \\ \hline \end{tabular} If Mg2+ hardness removal is not targeted, 62.5 should be omitted. Note that all values in the above table are in mg/L "as CaCO3 ". As a result, you have to convert the concentration of H2CO3 from the previous question in units of mg/L as CaCO3. Calculate the amount of lime (Ca(OH)2) needed in the lime soda softening process according to the guidelines in the table. Enter only the numerical part of the answer in units of mg/L "as CaCO3