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100 mL of tap water containing Ca(HCO(3)...

100 mL of tap water containing `Ca(HCO_(3))_(2)` was titrated with N/50 HCl with MeOH as indicator . If 30 mL of HCl were required , calculate the temporary hardness as parts of `CaCO_(3)` per `10^(6)` parts of water . If your answer is 'a x 100' , what is the value of 'a'.

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