# chemistry again

calculate the normality of a solution prpared by dissolving 220.0 mg of K2Cr2O7 in 100 ml solution that will be used to oxidize ferrous chloride according to the unbalanced reaction.

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1. 6FeCl2 + K2Cr2O7 + 14HCl ==>2CrCl3 + 2KCl + 6FeCl3 + 7H2O Check that.

molar mass K2Cr2O7 = 294.184
equivalent weight = 294.184/6 = 49.031
# equivalents K2Cr2O7 = grams/equivalent weight = 0.220 g/49.031 = ??
N = #eq/L. Substitute#equivalents and L and solve.

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posted by DrBob222
2. Why did u divine the molar mass by 6 for the equivalent weight??

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posted by Ben

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