Chem-To-Go Lesson 20Unit 5

WRITING AND BALANCING

CHEMICAL EQUATIONS

CHEMICAL REACTIONSProcess by which the

atoms of one or more substances are rearranged to form different substances

Law of Conservation of Matter – Matter is not created or destroyed during a chemical reaction.

Read a description of the reaction

Note what is reacted with what

Note what is yielded or produced

Write formulas for each compound

Use + to represent “and”Use to represent

“produces” or “yields”Include states of matter

where available (s) solid (l) liquid (g) gas (aq) dissolved in water

WRITING A CHEMICAL EQUATION

Sodium permanganate reacts with magnesium chlorite to produce sodium

chlorite and magnesium permanganate.

Read a description of the reaction

Note what is reacted with what

Note what is yielded or produced

Write formulas for each compound

Use + to represent “and”Use to represent

“produces” or “yields”Include states of matter

where available (s) solid (l) liquid (g) gas (aq) dissolved in water

WRITING A CHEMICAL EQUATION

Solid iron reacts with oxygen gas to produce solid iron (III) oxide.

Write the skeleton equation. BE SURE THE

FORMULAS ARE WRITTEN CORRECTLY.

Inventory reactantsInventory productsInsert coefficients to

make atoms of each element equal on both sides of the equation

Reduce the coefficients if possible

BALANCING A CHEMICAL EQUATION

NaMnO4 + Mg(ClO2)2 NaClO2 + Mg(MnO4)2

Write the skeleton equation. BE SURE THE

FORMULAS ARE WRITTEN CORRECTLY.

Inventory reactantsInventory productsInsert coefficients to

make atoms of each element equal on both sides of the equation

Reduce the coefficients if possible

BALANCING A CHEMICAL EQUATION

Fe(s) + O2(g) Fe2O3(s)