CHEMISTRY | MOLE CONCEPT | Question 18
a) Give the meaning of the following terms
i/ Excess reagents
ii/ limiting reagents
b) How to identify the limiting and excess reagent in stoichiometry?
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a/ the meaning of:
i/ Excess reagent refer to the chemical substain remain after the chemical reaction.
ii/ Limiting reagent refer to the chemical substance that are consumed during chemical reaction. -
b/ Determination of limiting and excess reagents in chemical reaction.
Formula,
Use a mole ratio
Mole ratio = mole reacted / Mole from equation (coefficient moles)
The smallest ratio is the limiting reagent.
The highest (largest) mole ratio is excess reagent.
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