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)