Chemical Reactions IntroductionLT 5C:Describe how the Law of Conservation of mass determines what

reactants and products will be in a reaction. • Identify the reactants and the products of a chemical reaction.• Determine how many atoms are reacting or being produced, given the formula of a

compound using subscripts and coefficients• Balance a chemical equation given the reactants and products of a reaction• Justify how chemical reactions obey the Law of Conservation of Mass

Vocabulary: • Chemical Reaction• Reactants• Products• Chemical Equation• Law of Conservation of Mass• Subscript• Coefficient

Chemical Equation

• Definition:

• Pieces:– Reactants:– Products:

• Example:

Making Salt

• Find 1 Na and 1 Cl• Also find the + and • Rearrange until you have NaCl.

• Reactants: _____ + _____• Products: __________• Chemical Equation: _____________________• Draw the Equation here:

Carbon Dioxide!

• Find 1 C and 2 O.

• Reactants: C + O2

• Products: CO2

• Reaction Equation: ______________________• Draw the reaction here:

Making Water

• Find 4 H and 2 O

• Reactants: H2 and O2

• Products: H2O• Chemical Equation: _____________________• Draw the reaction here:

Subscripts and Coefficients• Subscript:

• Coefficient:

• Water example:

Law of Conservation of Mass

• Definition:

• Implication:

Potassium Chloride

• Products: K + Cl2• Reactants: KCl• Chemical Equation: _____________________

• Draw the equation here:

With two products…

• Reactants: Mg + TiCl4

• Products: Ti + MgCl2

• Chemical Equation: _____________________

• Draw the equation here:

More Practice…1

• Reactants: HgO• Products: Hg + O2

• Chemical Equation: _____________________

• Draw the equation here:

More practice….2

• Reactants: KClO3

• Products: KCl + O2

• Chemical Equation: _____________________

• Draw the equation here:

More practice…3

• Reactants: CH4 + O2

• Products: CO2 + H2O• Chemical Equation: _____________________

• Draw the equation here: