23.3cm^3 of KMnO4 of 0.02 molddm-3 concentration reacts with 1.15g of Mg(NO2)2 .XH2O dissolved in 250cm^3 of water. Find the value for water of crystallization. (I believe there are 2.5x as many NO2- ions in solution as there are MnO4- ions reacted). Any help would be very much appreciated!
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