Stoichiomet

Stoichiometry

by Lilia Villalba

Be sure that you know:

Excess reactant

Limiting reactant

Conversion Factor

Molar Volume

Molar Mass

Nomenclature

Balance of equation

The Mol

1. Moles to grams and viceversa MOLAR MASS (From PT)2. Moles to molecules if it is a compound, moles to atoms if it is an element and viceversaAVOGADRO´S NUMBER (6.022X1023)3. Moles to L if it is a GAS at STPMOLAR VOLUME (22.4L)4. Atoms to molecules and viceversaFORMULA SUBSCRIPT 5.- Mol to Mol of other substance...Stoichiometric Coefficient (balance)

CONVERSION FACTORS

1. How many moles will be if you have 2.3X1024 silver atoms? 2. How many oxygen atoms are there in 122 molecules of Copper (II) Nitrate: CuNO3? 3.How many molecules are in 230 grams of CoCl2

Problems to start: ONE SUSTANCE Single stoichiometry

In summary, the steps to follow to solve reaction stoichiometry problems are the following:

Mol to Mol

Potassium chlorate (KClO3) is obtained by the reaction of chlorine (Cl2) and a solution of potassium hydroxide (KOH) also potassium chloride (KCl) and water (H2O) are produced in the reaction. Calculate the amount of potassium chlorate, in moles, obtained by reacting 10 mol of potassium hydroxide with the sufficient amount of chlorine. Calculate the amount of chlorine, in mol, that reacts completely with 5 mol of potassium hydroxide.

Using reactions

Tutorials

Balance the reaction Convert the amount of grams of A into moles of A Convert the moles of A into moles of B using the molar ratios from the BALANCED chemical reaction Convert the moles of B into grams of B

Stoichiometry mass to mass

Stoichiometry Map

When you´ve finally balanced that equation

You start with the 25 g of glucose for all the other calculations...

C6H12O6 + 6O2 --> 6CO2 + 6H2O

Mass to mass

Glucose (C6H12O6) reacts with oxygen (O2) to form carbon dioxide (CO2) and water vapor (H2O). How much mass of oxygen (in grams) does it take to react with 25 grams of glucose? How many grams of carbon dioxide and water will be formed?

Using reactions II

+ Exercises

Tutorials

Limiting reactant, Excess reactant and Percent yield

Video

Limiting reagent

Molecular hydrogen (H2) reacts with molecular oxygen (O2) to form water. If 40 g of hydrogen react with 40 g of oxygen, will all the masses of the reagents be consumed? Who is the limiting reagent?

Using reactions III

+ info

MASS STOICHIOMETRY

Video

More Problems

https://opentextbc.ca/introductorychemistry/chapter/mole-mass-and-mass-mass-calculations/

https://en.intl.chemicalaid.com/tools/equationbalancer.php

Keep working you will get it very soon!