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.

Slides:

Advertisements

Similar presentations

King – Law of Conservation/ Balanced Equations

Advertisements

Notes on Chemical Equations

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

Balancing Equations Flip Book. Balancing Equations Flip Book Take two sheets of paper Stagger them and then fold them over like steps. Balancing Equations.

What do you notice about the atoms in this equation?

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.

I can identify the products and reactants in a chemical reaction. I can state the law of conservation of matter. I can determine the number of each atom.

Chapter 7.2 – Chemical Equations -chemical reactions can be described two main ways 1.word equation – write the names of the products and reactants ex.

What is the Law of Conservation of Mass?

Law of Conservation of Mass Law of Conservation of Mass: Mass is neither created nor destroyed during a chemical reaction- it is conserved Mass reactants.

Topic: Chemical Formulas

Chemical Formulas and Equations H 2 O NaCl CO 2 2H 2 + O 2 = 2H 2 O.

Chemical Reactions. Nature of Reactions A chemical reaction is when you create a new substance with unique physical and chemical properties.

Balancing Equations I can demonstrate how mass is conserved during a chemical change.

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.

BALANCING CHEMICAL EQUATIONS Chapter 6.5 DAY 1 & 2.

Chemical equations are a specific description of what happens in a reaction Ex. 2H 2 O  2H 2 + O 2.

8th grade Science Chemical formulas and equations.

Section 2Chemical Reactions Section 2: Chemical Equations Preview Key Ideas Bellringer Describing Reactions Math Skills Balanced Equations and Mole Ratios.

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.

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

Chemical Changes Monroe What are the parts to a chemical formula? Coefficient Atoms Subscripts.

Intro video. -shorthand way to describe chemical reactions using symbols and formulas Instead of writing: “When you add solid silver to hydrogen sulfide.

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

Get a computer and get a bamboo!. Chemical Reactions & Equations Review Use your Bamboo to write in your answers I will request these files from you in.

(2.3)Conservation of Mass

7.4 BALANCIN G CHEMICAL EQUATION S Patrick Mattoon Keller Bean Griffin Rice.

Balancing Chemical Equations

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.

Counting Atoms Balancing Equations Law of Conservation of Mass

BALANCING EQUATIONS. CHEMICAL EQUATIONS Chemical Equation: Represents, with symbols and formulas, the identities and relative molecular or molar amounts.

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)

Glencoe Physical Science Chapter 21

Chemical Formulas. At the end of the day you will be able to: Identify elements in a formula Determine how many of each element are present.

Section 2Chemical Reactions Describing Reactions 〉 What is a chemical equation? 〉 A chemical equation uses symbols to represent a chemical reaction and.

Vocabulary – 1 st Foldable Reactants: the beginning items in a reaction; what you start with Products: what you end up with (on the right side of the arrow)

BALANCING CHEMICAL EQUATIONS H 2 + O 2 --> H 2 O.

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

Chapter 6, Section 2 Describing Chemical Reactions.

WARM UP 1.List 6 things that a chemical equation tells you about a chemical reaction.

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

BELL WORK 4/20/15 ANSWER ALL 3 OF THE FOLLOWING QUESTIONS: IS NaCl AN ELEMENT OR COMPOUND? EXPLAIN WHAT SKILL YOU NEED TO KNOW TO SOLVE THIS? DOES A CHEMICAL.

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:

Balancing Chemical Equations. Terms Subscript: Coefficient:

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

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

Section 2: Chemical Equations

2/4/2014 What is the law of conservation of mass? What does it mean for a chemical reaction to be balanced?

Balancing Equations Review

Balancing Equations.

Law of Conservation of Mass

Law of Conservation of Mass:

FORMING NEW SUBSTANCES

Chemical Reactions A chemical reaction is a chemical change that produces a new substance Involves breaking old bonds and forming new bonds. The chemical.

2B.5 Notes Chemical equation

FORMING NEW SUBSTANCES

FORMING NEW SUBSTANCES

Chemical equations.

Chapter 11.1b Describing Chemical Reactions

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.

Balancing Chemical Equations

Chemical equations Reactions!!!!.

Chemical equations.

Balancing Chemical Equations

FORMING NEW SUBSTANCES

CHEMICAL REACTIONS Reactants: Zn + I2 Product: Zn I2.

Presentation transcript:

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 atoms on each SIDE of the EQUATION.

mass begin = mass end

reactants product mass of reactants = mass of products Conservation of Mass

Balancing Act To balance the chemical equation, you must add COEFFICIENTS in front of the chemical formulas in the equation. A coefficient is a number placed in front of a chemical formula in an equation that shows how many atoms are involved in a reaction. (A multiplier) Ex. 2MgO means there are 2Mg and 2O (2 is the coefficient)

Conservation of Mass

Subscripts A subscript is a number written to the right of a chemical symbol and slightly below it. It tells how many atoms of that element. Ex. H 2 O would be 2 hydrogen and 1 oxygen You cannot ADD or CHANGE subscripts!

reactants product mass of reactants = mass of products Conservation of Mass

Example 1

Example 2

Iron + Oxygen -----> Rust 100 g + ? g > 143g mass reactants = mass products What is the mass of Oxygen? Conservation of Mass

What chemical equation is this?

37d75667b0a&t=Law-of-Conservation b45&t=Law-of-Conservation Brain Pop Conservation of Mass

Balancing Act Homework

Balancing Act Homework ANSWERS