Chemical Equations By: Mr. Castillo & Ms. Garcia.

Slides:

Advertisements

Similar presentations

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

Advertisements

Chemical Formulas & Equations 8 th Grade Science 2010 H 2 O NaCl CO 2 2H 2 + O 2 = 2H 2 O.

Chemical Equations Chemistry Mrs. Coyle. Chemical Equations: represent chemical reactions Word Equations Skeleton Chemical Equations Balanced Chemical.

Chemical Reactions.

CHEMICAL EQUATIONS, SYMBOLS, FORMULAS & LAW OF CONSERVATION 7-5.5, &

What is a chemical formula? 2. View examples of chemical formulas. 3. What is a coefficient? 4. What is a subscript? 5. Differentiate between.

Chemical Equations Putting chemical changes into words.

Balancing Chemical Equations Chapter 7. What is Balancing? Making sure there are equal numbers of each type of atom on each side of a chemical reaction.

Chemistry Chemical Reactions – Rearranging Atoms.

What is the Law of Conservation of Mass?

Chemical Reactions. Chemical Equations A chemical equation is a representation of a chemical reaction; the formulas of the reactants (on the left) are.

D ESCRIBING C HEMICAL R EACTIONS Chapter 6 Section 2.

Notes – Chemical Equations Chapter 8, Lesson 2. Conservation of Mass When the end of the last period bell rang, everyone moved to a new room, and ended.

Chemical Changes. Chemical Reactions A change in which one or more substances are changed into new substances Chemical equations have two parts Reactants.

Balancing Chemical Equations. Parts of a Chemical Equation What is a chemical equation? It is a way to symbolize what is happening in a chemical reaction.

Chemical Reactions Equations. Chemical Equations and Reactions Law of conservation of mass – during a chemical reaction, the total mass of the reacting.

 A chemical equation is a short, easy way to show a chemical reaction using symbols instead of words.  A reactant is the substance you have at the beginning.

BALANCING EQUATIONS… A balancing act.. What are they for?!?! Chemical Equation: a way to represent chemical reactions on paper.

Balancing equations Unit 2 Chemistry. Writing Chemical Equations Products: are the chemicals that are made or produced in the reaction. Reactants: are.

Fe iron Pb lead Au gold C carbon Co cobalt K potassium Ne neon N nitrogen.

Chemical Reactions Balancing and classifying.. Balanced Equations  Notice that the number of mercury atoms is the same on both sides of the equation.

CHEMICAL REACTIONS. WHAT IS A CHEMICAL REACTION? Changes or transforms chemicals into other chemicals Ex: Iron + Oxygen  Iron Oxide (rust) Physical Science.

Chemical Reactions and Conservation of Mass

Law of Conservation of Matter or Law of Conservation of Mass

1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different.

1. What does The Law of Conservation of Mass State? 2. How many atoms of each elements do you have in the following compounds: a. Mg(OH) 2 b. 4H 2 O c.

822 Recognize that in a chemical reaction the mass of the reactants is equal to the mass of the products (Law of Conservation of mass)

Balancing Act Atoms are not CREATED or DESTROYED during a chemical reaction. This is the LAW OF CONSERVATION OF MASS. There must be the SAME number of.

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,

Balancing Chemical Equations What is a chemical equation? There are 2 sides to a chemical equation. The Reactants – what is being combined (the arrow points.

Chemical Reactions: The Law of Conservation of Mass.

Describing Reactions What is a chemical equation? What is a balanced equation? How can equations be checked for balance?

Chemical Reactions Notes. Reactants Products Substances that undergo a change New substances formed Yields or Produces.

Chapter 6, Section 2 Describing Chemical Reactions.

WARM UP Write a balanced chemical equation for the reaction of iron (3+) with atmospheric oxygen, producing rust (iron oxide).

Balancing Chemical Equations. Chemical Equations Review  Chemical equations need to be balanced due to the Law of Conservation of Mass.  This law states.

Balancing Chemical Equations TEKS 8.5D recognize that chemical formulas are used to identify substances and determine the number of atoms of each element.

Today’s Objective The student will be able to recognize if a chemical equation is balanced by counting atoms on reactant and product side.

Chemical Formulas and Equations. Parts of a formula Coefficient: the number in front of the symbol, which tells you how many molecules there are. Subscript:

THE LAW OF CONSERVATION OF MASS. MASS cannot be CREATED OR DESTROYED during the course of a CHEMICAL REACTION. Reactants > Products Mass of Reactants.

Balancing Chemical Equations

Chemical Reactions.

Balancing Chemical Equations

Chemical Reactions and Equations

7.P.2B.5 Develop and use models to explain how chemical reactions are supported by the law of conservation of matter.

The Law of Conservation of Matter

Balancing Chemical Equations

Law of Conservation of Mass AKA: Law of Conservation of Matter

The Law of Conservation of Mass

The Law of Conservation of Mass

Balancing Equations.

FORMING NEW SUBSTANCES

2B.5 Notes Chemical equation

FORMING NEW SUBSTANCES

FORMING NEW SUBSTANCES

Law of Conservation of Mass AKA: Law of Conservation of Matter

Chemical equations.

Balancing Equations In Chemical Reactions.

The left side of the equation contains the reactants, which interact to form the new substances, or products. The products are on the right side.

Each element has a different symbol

Chemical equations Reactions!!!!.

Unit 3: Chemical Equations and Stoichiometry

Chemical equations.

Unit 3: Chemical Equations and Stoichiometry

FORMING NEW SUBSTANCES

Balancing Chemical Equations

Presentation transcript:

Chemical Equations By: Mr. Castillo & Ms. Garcia

Chemical Equations We learned that elements and compounds chemically react and exchange atoms. That, during the reaction the atoms are rearranged into a new substance. Today, we will learn that these reactions must be balanced.

Chemical Equations Chemical equation: A short way of showing a balanced chemical reaction using symbols, subscripts, and coefficients. Example: 2H 2 + O 2 2H 2 O ( 4 Hydrogen and 2 oxygen )( 4 Hydrogen and 2 oxygen ) Chemical equations have an equal number of elements and atoms on both sides of the reaction.

Chemical Equations Chemical equation examples:

Law of conservation of Mass Conservation of Mass: States that mass is neither created nor destroyed in any chemical reaction; mass remains balanced. Conservation: To save. Balanced: Even or equal.

Conservation of Mass Conservation of mass examples: Reactants > Products Mass of Reactants = Mass of Products Iron + Oxygen -----> Rust 100 g + 43g > 143g mass reactants = mass products mass products = 143g = mass reactants

Review Any questions???