Balancing Chemical Equations. Writing Chemical Equations Reactant  Products Reactant – what you start with in a chemical reaction. It is on the left.

Slides:

Advertisements

Similar presentations

Equations. Chemical Reaction When a substance goes through a reaction and changes into another substance.

Advertisements

The Language of Chemistry

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

Chemical Reactions.

Chemistry Notes: Chemical Reactions Chemistry

Describing Chemical Change OBJECTIVES: Write equations describing chemical reactions, using appropriate symbols.

4.3 Conservation of Mass and Chemical Equations

Balanced Chemical Equations. Conservation of Matter Matter can neither be created nor destroyed by any physical or chemical change. Atoms that start a.

CHEMICAL REACTIONS Describing Chemical Change Objectives Write equations describing chemical reactions using appropriate symbols Write balanced chemical.

Aim CE1a What does the chemical equation for photosynthesis tell us?

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

Chapter 9. Law of Conservation of Matter Chemical reactions occur when one or more substances are rearranged to form new substances. Ex: 2 Na + H 2 O.

CHEMICAL REACTIONS. Chemical Reactions A process by which the atoms of one or more substances are rearranged to form different substances A process by.

Unit 4: Toxins Intro Chemistry. Chemical Toxins Chemistry is the study of matter and the changes that it undergoes. Chemistry is the study of matter and.

Chemical Reactions Ch. 8 Dr. Michael J Passow.

A 2 + 3BA2B3A2B3 Balancing Equations can be fun yet tough! This presentation will provide you some helpful tricks.

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.

Writing Chemical Equations

Types of Reactions and Balancing Equations.  A. also known as a “chemical change”  B. Indicators of a Chemical Reaction  1. Light production  2. Odor.

CHEMICAL REACTIONS Chemistry 112. Writing Chemical Reactions In any chemical reaction, reactants are converted to products reactants → products There.

Do Now  Please write HW in your agenda.  Please update your table of contents.  Fold and attach the notes to page 119.  Answer the entrance ticket.

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

Chapter 9 Balancing Equations Part 1. Terms A chemical reaction is a process that always results in the change of chemical substances. A chemical equation.

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

“Chemical Reactions”. All chemical reactions…  have two parts: 1.Reactants = the stuff you start with 2.Products = the stuff you end up with  The reactants.

Chemical Reactions Chapter 11. Section 1: Describing Chemical Reactions.

Writing and Balancing Chemical Equations A Review by Mrs. Volpe.

Chemical Equations. Chemical Equation: A method of representing reactants and products of a reaction by showing the formulas. Example:2H 2 + O 2 → 2H.

Chemistry 11.1 “Describing Chemical Changes”. Review A. Reactants  Products B. Dalton’s Theory… “As reactants are converted to products, the bonds holding.

Describing Chemical Reactions The process by which the atoms of one or more substances are rearranged to form different substances is called a chemical.

Chapter 11.1: Describing Chemical Reactions

Chemical Reactions Chemistry. All Chemical Reactions have two parts: 1.Reactants = the substances you start with 2.Products = the substances you end up.

BALANCING CHEMICAL EQUATIONS

Chapter 11 Matter and Change 11.1 Describing Chemical Reactions

Glencoe Physical Science Chapter 21

Chemical Reactions. Learning target: I can balance chemical equations. Why learn this? This concept introduces you to the idea that matter is not created.

Writing and Balancing Chemical Reactions. Chemical Equation A description of a chemical reaction, using symbols and formulas to represent the elements.

Why are chemical reactions important??? Chemical reactions allow living things (cells, animals, people, insects) to grow, develop, reproduce, and adapt.

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

Chapter 11 Chemical Reactions Chemical Reactions Reactants: starting material in a chemical reaction Products: substance formed in a chemical reaction.

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.

Ch. 7 & 8 Notes -- Chemical Reactions Chemical equations give information in two major areas: 1. _____________ and ______________ of the reaction. 2. Coefficients.

The Chemical Reaction Equation. What it’s all about How much of what to react with something else to make something new. Conservation of mass is the overarching.

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

Introduction to Chemical Equations ,

Chemical Reactions. In a chemical reaction, atoms are rearranged to form new compounds. The starting substances = reactants Ending substances = products.

Chemical Reactions. In a chemical reaction: there is a change in the way atoms are joined together there is a change in the way atoms are joined together.

CHEMICAL REACTIONS CHAPTER 11. WHAT ARE THE PARTS OF A CHEMICAL REACTION? 1.REACTANTS 2.PRODUCTS 3.  YIELD; SEPARATES THE REACTANTS FROM THE PRODUCTS.

Law of Conservation of Mass. causes a chemical change, which creates a new substance with new and different properties.

Chemical Reactions Chapter 11. Introduction On May 6, 1937, the huge airship Hindenburg erupted into a fireball. Within a short time, 210,000 cubic meters.

Reactants and Products  A chemical reaction is the process by which atoms or groups of atoms in substances are reorganized into different substances.

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

Writing and Balancing Equations. Chemical Reactions A chemical reaction is the process by which one or more substances are changed into different substances.

Chapter 11 Matter and Change 11.1 Describing Chemical Reactions

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

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

How to Balance Chemical Equations

Chemical Reactions Chapter 11.

Writing and Balancing Equations

Chemical Equations Unit 5.1.

Chemical Reactions: Chp 8.

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

Writing Chemical Equations

Balancing equations.

Chemical Reactions: Chp 8.

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.

11.1 Describing Chemical Reactions

Chemistry I Honors Northwestern High School Jeff Venables

Use the following key to draw molecules like we did yesterday to show 2 molecules of C2H6 reacting with oxygen molecules to form carbon dioxide and water.

Presentation transcript:

Balancing Chemical Equations

Writing Chemical Equations Reactant  Products Reactant – what you start with in a chemical reaction. It is on the left side of the arrow.  - means yields or produces Product – this is what you end up with in a chemical reaction. + - and or added together HCl + NaOH  NaCl + H 2 O is read as HCl added together with NaOH yields NaCl and H 2 O

Other Parts of the Chemical Equation (s) – indicates a solid substance (l) – indicates a liquid substance (g) – indicates a gaseous substance (aq) – indicates an aqueous substance - indicates that heat is supplied to the reaction - indicates that a catalyst is used in the reaction Catalyst – a substance that speeds up a chemical reaction but is not used up.

The Skeleton Equation The skeleton equation is a chemical equation that does not indicate the relative amounts of reactants and products. It is the first step in writing a complete chemical equation Fe + O 2  Fe 2 O 3

Why Must the Chemical Equation Be Balanced? The law of conservation of matter states that matter cannot be created or destroyed. A chemical equation must have the same number of atoms of each element on each side. A chemical equation is like a see-saw, it doesn’t work unless both sides are balanced.

Balancing the Chemical Equation What is wrong with the following equation? Fe + O 2  Fe 2 O 3 To balance this equation, first write out the skeleton equation with the elements on each side underneath. Next, write out the atoms of each element on each side. Fe + O 2  Fe 2 O 3 Fe = Fe= O = O=

Balancing the Chemical Equation To balance the chemical equation, we must add coefficients to each side. A coefficient is a whole number placed in front of a chemical formula to balance the equation. Use trial and error to decide on the coefficients needed one compound at a time. __Fe + __O 2  __Fe 2 O 3 Fe = 1 Fe= 2 O = 2 O = 3 2 x 2=2 2 x 2=4 x 2=6 4 x 4=4 x 3=6 3

Balancing the Chemical Equation 4Fe + 3O 2  2Fe 2 O 3 Now that both sides have the same number of atoms, it is called a balanced equation.