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Law of Conservation of Mass

TEK 8.5F

Donald Becker

on 4 December 2012

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Transcript of Law of Conservation of Mass

Coefficient If the equation is not balanced, we balance them by adding coefficients Compounds that are produced or created because of the chemical reaction Product Law of Conservation of Mass Mass of the reactants in any chemical reaction equals the mass of the products.

If a gas is produced then its mass also contributes to the mass of the products Balanced Equation Law of Conservation of Mass also applies to balancing equations Law of Conservation of Mass Products Reactants Reactant A substance that is entered into and changed by a chemical reaction Yield To produce as a result of a chemical reaction

Represented by an arrow in a chemical equation REACTANT PRODUCT REACTANT PRODUCT (YIELDS) REACTANT (YIELDS) PRODUCT Reactant Mass = Product Mass HC2H3O2

Vinegar + NaHCO

Baking Soda (Yield) Reactants H2O

Water + CO2

Carbon Dioxide + NaC2H3O2

Sodium Acetate Products Hydrogen - 5
Carbon - 3
Oxygen - 3
Sodium - 1 Hydrogen - 5
Carbon - 3
Oxygen - 3
Sodium - 1 H2 + O2

H = 2
O = 2 H2O

H = 2
O = 1 To balance this equation, we must add coefficients.

H = 4
O = 2 2H2O

H = 4
O = 2
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