# Chemical Reaction & Stoichiometry – Chemistry

### Chemical Reaction & Stoichiometry – Chemistry

These Chemistry chapters discuss calculations and amount of chemical substances involved in chemical reaction & Stoichiometry –

Stoichiometry

Part of chemistry that studies amount of substances that are involved in chemical reactions

Mole Ratio

Identify how many moles of product are formed from a certain amount of reactant.

Molar mass

Defined as the mass of given substance divided by its amount of substance

Limiting Reaction

How much of the product is produce

Excess Reaction

what is left over

Theoretical yield

Quantify of a product obtained from the complete conversion of the limiting reactant in chemical reaction

Actual yield

The amount actually produced of a product

Percent yield

Calculated to be the experimental yield divided by the throetical yield multiplied by 100%

Reactant

A substance that takes part in and undergoes change during a reaction

Product

Substance that is formed as the results of a chemical reaction.

explain the concept of mole ratio as used in reaction stoichiometry problems

a.The concept of mole ratio in reaction stoichiometry problems are used as conversion factors from moles of a reactant to another.The ratio is also used to show the balance equation of the reaction occurring. For example, converting moles to grams.

Distinguish between the theoretical yield and actual yield in stoichiometric calculation

Theoretical yield is predict amount and actual yield is the actual amount

what is its role in reaction stoichiometry

The molar mass used to convert between grams and moles

what is the percentage yield of a reaction

The amount over the theoretical amount multiplied by 100.

why are actual yields usually less calculated theoretical yields

The actual is determined by the limited reactant

What is the first thing that must be done in a stoichiometry problem?

Write a balanced equation for the reaction.

How do you know which is the limiting reactant?

Find the limiting reagent by looking at the number of moles of each reactant.

An ion of bromine with a single negative charge has the symbol and the name

Br-, bromide ion.

The platinum(II) ion and the platinum(IV) ion

have charges of 2+and 4+, respectively.

What is the name of the compound made of zinc ions, Zn2+, and fluoride ions, F-?

zinc fluoride

What is the chemical formula for the compound made of tin(IV) ions and chloride, Cl-, ions?

SnCl4

What is the formula for the compound made of aluminum ions, Al3+, and sulfate ions, SO-?

Al2(SO4)3

How many atoms are present in one formula unit of barium acetate, Ba(C2H3O2)2?

15

What is the formula for the compound dinitrogen tetroxide?

N2O4

The term acid usually refers to

a solution of the acid compound in water.

What is the formula for carbonic acid?

H2CO3

The salt calcium nitrate, Ca(NO3)2, contains the anion from

nitric acid.

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