6. Give reaction equations for the quantitative determination of calcium chloride (Mr [CaCl2*6H2O] 219.08) by complexometry. Indicate the indicator, the color transition at the end of the titration. Calculate the titer for the substance being determined, a weighed portion of calcium chloride, so that 25.0 ml of a 0.05 mol/l solution of Trilon B (K = 0.98) is used for titration.

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