Chemical Balancing The Law of Conservation of Mass:

Slides:



Advertisements
Similar presentations
Chemical Formulas & Equations. Molecule A combination of two or more atoms bonded together.
Advertisements

Balancing Chemical Equations
Balancing Chemical Equations. Why do we need to Balance Chemical Equations? The Law of Conservation of Mass The # of atoms must stay the same on both.
(2.3) Balancing Chemical Equations (p150). Conservation of Mass As we saw in class, the mass of the reactants must equal the mass of the products in a.
Chemical Reactions Equations. Chemical Equations and Reactions Law of conservation of mass – during a chemical reaction, the total mass of the reacting.
CHEMICAL REACTIONS L.H.S. R.H.S. Reactants Products FROM LAW OF CONSERVATION OF MASS: Must have Same Number of Atoms of Each Type on Both Sides of the.
Writing Chemical Formulas Balancing Chemical Equations.
BALANCING CHEMICAL EQUATIONS H 2 + O 2 --> H 2 O.
Law of Conservation of Mass. Think about the following question: –If you burned a log in the fireplace, would the mass of the products (smoke, ashes,
WARM UP 1.List 6 things that a chemical equation tells you about a chemical reaction.
Chemical Reactions: The Law of Conservation of Mass
Balancing Chemical Equations
Balancing Chemical Equations
Chemical Reactions.
Balancing Equations.
Balancing Chemical Equations
Burning is a chemical change
Balancing Chemical Equations
Chemistry-Part 3 Notes Chemical Equations & Reactions
7.P.2B.5 Develop and use models to explain how chemical reactions are supported by the law of conservation of matter.
Writing and Balancing Equations
Why is it the LAW of CONSERVATION OF MATTER or MASS?
Balancing Chemical Equations
The Law of Conservation of Mass:
Balancing Chemical Equations
Types of Reactions.
Chemical Reactions: The Law of Conservation of Mass
Balancing Equations Review
Balancing Chemical Equations
Law of Conservation of Mass
The Law of Conservation of Mass:
Chemical reactions Unit
Chemical reactions Unit
The Law of Conservation of Mass
Chemical Equations A Balancing Act.
Law of Conservation of Mass through Balancing Equations
Balancing Equations.
Chemical Equation A shorthand way of reporting details of a chemical reaction Reactants The starting substances in a reaction Placed on the left side of.
Chapter 6.2 Describing Chemical Reactions
Balancing, States of Matter, and Writing
Chemical Equations A Balancing Act.
Chemical Reactions Conservation of Mass.
Types of Reactions.
Types of Reactions.
FORMING NEW SUBSTANCES
Balancing Chemical Equations
Balancing Chemical Equations
Balancing Chemical Equations
Unit 1 - Matter Changes of Matter.
FORMING NEW SUBSTANCES
FORMING NEW SUBSTANCES
Chemical Reactions Chapter 10.
Conserving Mass in Chemical Reactions
Chemical Equations.
Chemical Reactions: The Law of Conservation of Mass
Law of Conservation of Mass
Chemical equations.
Balancing Chemical Equations
Balancing Chemical Equations
Balancing Chemical Equations
Chapter 11.1b Describing Chemical Reactions
Information in Chemical Equations (Balancing)
Balancing Equations In Chemical Reactions.
Chemical equations.
Balancing Chemical Equations
Balancing Chemical Equations
FORMING NEW SUBSTANCES
Balancing Chemical Equations
Balancing Chemical Equations
Balancing Chemical Equations
Presentation transcript:

Chemical Balancing The Law of Conservation of Mass: No matter can be created or destroyed in a chemical reaction! So, the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products.

How to Balance Chemical Equations Step One: Write down worded equation first and then the equation. Propane + Oxygen Gas  Water + Carbon Dioxide 𝐶3𝐻8 + O2  H2O + CO2

How to Balance Chemical Equations Step Two: Write down the number of atoms per each element that you haven on each side of the equation. (Tables can make it easier!) Element Reactants Products C 3 1 H 8 2 O 2 3 When balancing the equation, always leave Hydrogen and Oxygen for last.

How to Balance Chemical Equations Step Three: If you have more than one element to balance, start with the element that appears in only single molecule of reactants and in only a single molecule of products. So, we start with Carbon atoms first.

How to Balance Chemical Equations Step Four: Add a coefficient to the single carbon atom on the right of the equation to balance it with the 3 carbon atoms on the left of the equation. Balanced 𝐶3𝐻8 + O2  H2O + CO2 3 Balanced Element Reactants Products C 3 1 x3 = 3 H 8 2 O 2 3

How to Balance Chemical Equations 𝐶3𝐻8 + O2  H2O +3CO2 Step Five: Balance the Hydrogen atom next. You have 8 on the left side, so you need 8 on the right side. On the right side, add a 4 as the coefficient. Now there are 10 Oxygen atoms Balanced 𝐶3𝐻8 + O2  H2O +3CO2 4 Element Reactants Products Balanced C 3 3 H 8 2 x4 = 8 O 2 10 3

How to Balance Chemical Equations 𝐶3𝐻8 + O2  4H2O +3CO2 Step Six: Now balance the oxygen atom. There are 10 molecules in the product side but only 2 in the reactants side. So place a coefficient of 5 in the reactants. Balanced 𝐶3𝐻8 + O2 4H2O +3CO2 5 Balanced Element Reactants Products C 3 3 H 8 8 O 2 x5 = 10 10

How to Balance Chemical Equations Now your equation is balanced and should look like this: 𝐶3𝐻8 + 5O2 4H2O +3CO2 Element Reactants Products C 3 3 H 8 8 O 10 10 Since the Laws of Conservation of Mass has been maintained the equation is complete!