susanguido Posts: 11, Reputation: 1 New Member #1 Oct 1, 2015, 04:43 AM
Original concentration
A student performs the following gravimetric analysis of iron ions in a water system:
Fe2+ (aq) + 2CO32- (aq) = FeCO3 (s)
If this student used excess carbonate and obtained the following data, what was the original concentration in moles/L) of Fe2+ in the water sample?
Total Volume of Solution: 100.00 mL
Mass of FeCO3 collected: 23.758 grams.

Is this how you would solve it change 100 ml to .1 liters. 115.853x = 23.758 x .1 = .02 liters

[FONT=Georgia, Times New Roman, Times, serif]trying to find the original concentration do I use this formula m1v1 x m2v2 115.83 i calculated from the original mass of FeCO3

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