January 11, 2025, 01:54:09 AM
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How do you find the excess reactant mass when you only have the mass of each reactant to go on?

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Topic: finding excess reactant's mass  (Read 3161 times)

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Offline skyelit

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finding excess reactant's mass
« on: September 11, 2007, 04:19:37 AM »
I was wondering...If two reactants have the same mass (eg. 1.0g) and they are present in a 1:2 ratio...is it possible to calculate the mass of the excess reactant..WITHOUT finding the number of mole and so on... >:( ::) :-[ :-X
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Offline AWK

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Re: finding excess reactant's mass
« Reply #1 on: September 11, 2007, 05:21:54 AM »
Quote from: skyelit on September 11, 2007, 04:19:37 AM
I was wondering...If two reactants have the same mass (eg. 1.0g) and they are present in a 1:2 ratio...is it possible to calculate the mass of the excess reactant..WITHOUT finding the number of mole and so on... >:( ::) :-[ :-X
To start any calculations concerning limiting (or excess) reagent you should know an exact stoichiometry of reaction (balanced equation).

In your example you have 1:1 mass ratio of reagent, and probably 1:2 molar ratio of reagents but no reaction is given
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