94. When determining carbonate hardness for titration of 250 ml of water, 14 ml of a 0.1 M HCl solution will be consumed. Determine the permanent hardness of water if the total hardness is 7.3 mmol-eq/l. Indicate the volume of the aliquot, working solution; What indicator is used to determine carbonate hardness by titration? How long is the titration?
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