Reactants in excess, Chemistry

Assignment Help:

Q. Use of Reactants in Excess?

Ans.

Consider a recipe for pancakes that calls for 2 cups of pancake batter mix and 1 cup of water. The result of this recipe is 14 pancakes.

Let's say you have only one cup of pancake mix. Can you still make the recipe? Of course! just make half the recipe. In this case the pancake mix is the limiting reagent.

What if you have 4 cups of water but only 2 cups of pancake mix? The two reactants aren't present in the correct ratio, so one of these is the limiting reagent. It seems that the limiting reagent is the pancake mix and that there are 2 cups of water in excess. A reactant in excess will always have an amount left over after the other reactant is used up.

Now in chemical terms, let's examine the idea of limiting reagent and excess.

2 Mg + O2 -> 2 MgO

Let's say in our case 1 mole of oxygen reacts with 3 moles of magnesium. You still obtain 2 moles of magnesium oxide. There is 1 mole of magnesium in excess, which tells you oxygen is the limiting reagent.


Related Discussions:- Reactants in excess

Proportional Error, Which sample is better to use, bigger sample or smaller...

Which sample is better to use, bigger sample or smaller sample?

Studen of university, application of matlab in analytical chemistry

application of matlab in analytical chemistry

Chemistry In Everyday Life, I''ve got a project on ''Chemicals In Medicine'...

I''ve got a project on ''Chemicals In Medicine'' and i need guidance as i cannot figure out how to conclude my project.Would you please help me ? I hope you''ll pay heed to my earn

What are the properties of nitrogen, Q. What are the Properties of Nitrogen...

Q. What are the Properties of Nitrogen? Ans. Physical Properties of Nitrogen Nitrogen is a colorless, odorless and tasteless gas. It is particularly unreactive at roo

#title.hplc, what is the function of detectors in hplc?

what is the function of detectors in hplc?

The order of stability of carbocations and carbanions , the order of stabil...

the order of stability of carbocations and carbanions For carbocation 3 degree > 2 degree > 1 degree for carbanion 1 degree > 2 degree > 3 degree

SOLID STATE, HOW UNIT CELL AND SPACE LATTICE ARE RELATED TO EACH OTHER?

HOW UNIT CELL AND SPACE LATTICE ARE RELATED TO EACH OTHER?

What is hydrate isomerism, Q. What is Hydrate Isomerism? In a compound,...

Q. What is Hydrate Isomerism? In a compound, water molecules may be present in either coordinated form or as water of crystallisation In the former case water  molecules are di

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd