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

Explanation of tar, The tar command was invented to backup directory trees ...

The tar command was invented to backup directory trees to magnetic tape. The name is short for 'tape archive´. A directory tree is a branching structure, b ut a magnetic tape is a

Concentration factors affecting taste quality, Q. Concentration factors aff...

Q. Concentration factors affecting taste quality? There is a specific range at which the tasteful substances should be used. The concentration required for identification is

The highest covalent character, Highest covalent character is found in: ...

Highest covalent character is found in: (a1  CaF 2                                              (2) CaCl 2               (3) CaBr 2                              (4)

.glycol, i wanted the glycol properties and its chemical reactions n prepar...

i wanted the glycol properties and its chemical reactions n preparation

Organic, interconversion of phenol to meta-bromo phenol

interconversion of phenol to meta-bromo phenol

Explain the statement water has bent geometry, Explain the statement "Water...

Explain the statement "Water has bent geometry" Water has bent geometry; that is, the H-O-H bond angle is approximately tetrahedral. Repulsion among the lone pairs and the bond

Show uses of sulphur, Q. Show Uses of Sulphur? Sulphur is used in the m...

Q. Show Uses of Sulphur? Sulphur is used in the manufacture of sulphur dioxide, sulphuric acid, and gunpowder. Match. fertilisers, drugs, bleaching agents, leather and other pr

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