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Please answer and explain, thanks Based on the state of matter of the reactants, predict the...


Please answer and explain, thanks

Based on the state of matter of the reactants, predict the relative speed of the reactions below. Assume they are occurring at room temperature. Rank them from slowest to fastest.
A. 2Cr+2(aq) + Sn+4(aq) ? 2Cr+3(aq) + Sn+2(aq)
B. 4Fe(s) + 3O2(g) ? 2Fe2O3(s)
C. C6H14(l) + 9

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Answer #1

The order is from fastest to slowest

B CA

This is so because, the more intimate contact between the reactants the fastest the reaction will be. There is a lot of interaction in liquid phase (point A) , less interaction in (C) because the reagents are one in liquid phase and the other in gas phase. It takes time for oxygen to diffuse inside the liquid.. The extreme case is the reaction B when Oxygen can't diffund into the Fe metal and react only superficially.

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