Balancing Chemical Equations

Chemical Reactions

Vocabulary

How to Balance Equations

Writing and Naming Ionic & Molecular Compounds

100

What is the Reactant of the chemical equation and where is it located?

The reactant is the original equation and it is always located on the left side of the equation.

100

By definition, the Law of Conservation of Mass states that __________

during a chemical reaction, the total mass of the products must be equal to the total mass of the reactants

100

Balance the following equation: _____H2 + ____O2 ---> ____H2O

2 H2 + 1O2 ---> 2H2O

100

What is the FIRST step to balancing chemical equations?

Draw a T-Chart and list the elements

100

Name this compound NaCl

Sodium Choride

200

What is the Product of a chemical equation and where is it located?

The product is the chemical change or new substance. It is always located on the right side of the equation.

200

This is the force that holds atoms in a compound together. (Hint: think small!!!)

What is chemical BOND?

200

Balance the following Equation: _____KClO3 ---> KCl + ______O2

2KClO3 ---> 2KCl + 3O2

200

Which part of the chemical equation are you to add or change.

The Coefficients

200

Transition metals use what to indicate their charge when naming?

Roman Numerals - Ex: Iron (III) or Iron (II)

300

Identify the reactants and products in the following chemical equation: H2 + NaCl ---> H2Na + Cl + S

Reactants: H, Na, Cl Products: H, Na, Cl, S

300

What type of bond is in a molecular compound

Covalent bond

300

Balance the following equation: ____C3H8 + _____O2 ---> ____CO2 + ____H2O

1C3H8 + 5O2 ---> 3CO2 + 4H2O

300

Within a chemical formula, if you don't see a subscript, you can conclude that there are how many atoms of that element within each molecule.

One

300

Reverse Swap and Drop, what were the original charges of Mg and Cl?

MgCl₂

Mg = +2

Cl = -1

400

What does the law of conservation of mass states?

The law of conservation of mass states that matter durning a chemical change can neither be created nor destroyed.

400

What is the name of the horizontal rows on the periodic table?

periods

400

Balance the following equation: ____P + _____O2 --->_____P2O5

4P + 5O2 ---> 2P2O5

400

What is the THIRD step of balancing a chemical equation?

The third step is to adjust the coefficient of each molecule to balance out equally.

400

Name this compound: BeSO₄

beryllium sulfate

500

What is the meaning of a subscript? Also, how many atoms does each element have in the following chemical equation: NaOH + H2CO3 ---> Na2CO3 + H2O *Note - All the numbers are subscripts

A subscript is written below. Reactant - 1Na, 4O, 3H, 1C Product - 2Na, 1C, 4O, 2H

500

This is a way to speed chemical reactions.

Answers may vary, but should include: higher temperature, higher concentration of reactants, or increased surface area.

500

Balance the following equation: ___NaBr + ____CaF2 ---> ____NaF + ____CaBr2

2NaBr + 1CaF2 ---> 2NaF + 1CaBr2

500

What is one reason that we balance chemical equations?

To validate that the Law of Conservation of Mass is true.

500

Write this name as a compound

NH₄ClO₃