This has to do with a lab I did where a reaction with HCl and Zinc took place as

Question

This has to do with a lab I did where a reaction with HCl and Zinc took place as well as Copper wire and Sulfur. (poured HCl onto Zinc until all the Zinc metal was gone and then burned off the liquid, covered the copper wire with sulfur in a crucible and burned that too)

Why is it advantageous to use one reagent in excess when you do a reaction? Ideally what kind of property must the reagent used in excess have in comparison to the properties of the product in order to be used in excess? In which way do HCl and Sulfur, respectively, fulfill these conditions?

Explanation / Answer

1.It helps us find out which is the limiting reagent and the actual mole ratio of the components in the reaction

2. They should generaly have a lower density

they should be easily measurable(e.g , liquid or powder)

3. Both HCl and sulphur will be easy to measure when used in excess since HCl is in liquid form and sulphur in powder compared to small wires of zinc

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