Balancing Equations Conservation of mass. - Describing Chemical Reactions What Are Chemical Equations? chemical formulas and other symbols instead of.

Slides:

Advertisements

Similar presentations

Chemical Changes.

Advertisements

Notes on Chemical Equations

Chemical Reactions.

Chapter 7 Chemical Reactions.

Chapter 20 – Chemical Reactions 20.1 – Chemical Changes Physical change occurs when only the physical properties of a substance changes. Evidence: change.

Chapter 2: Chemical Reactions Section 1: Observing Chemical Changes How can matter and changes in matter be described? In terms of two kinds of properties-

Table of Contents Chapter Preview 6.1 Observing Chemical Change

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.

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.

Chemical Reactions - Observing Chemical Change Properties and Changes in Matter Matter can undergo both physical change and chemical change.

2.11 Describing Chemical Reactions (Sec 9.1 pg )

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

 Chemical Reaction – Occurs when substances undergo chemical changes to form new substances › Usually you can see a chemical change take place!  Signs.

Chemistry Vocabulary: Part 4

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.

What are some clues that a chemical reaction has taken place?

Chapter 1 Section 1: Matter & its changes Why are elements sometimes called the building blocks of matter?  All matter (anything that has mass and takes.

Chemical Reactions Section 1: Observing Chemical Changes How can matter and changes in matter be described? Chemical Reactions Section 1: Observing Chemical.

Unit 2: Chemical Interactions Chapter 6: Chemical Reactions Big Idea: Chemical reactions are processes in which atoms are rearranged into different combinations.

Chapter: Chemical Reactions Table of Contents Section 1: Chemical Formulas and Equations What you will learn and why is it important: page 492.

When elements are chemically combined, they form compounds having properties that are different from those of the uncombined elements.

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.

Chapter 17 Chemical Reactions.

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

Chapter 6 Chemical Reactions. Matter and Change Changes in matter can be described in terms of physical changes and chemical changes. A physical property.

Chapter 3 Practice Test Practice Test Reactions and Equations.

Balancing Chemical Equations

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

4 – Investigate and describe the compounds formed by bonding elements. 3 – Describe why certain elements bond with others. 2 – Use the periodic table.

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

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

Chapter 6 Section 2 Notes A chemical equation is a short, easy way to show a chemical reaction. Chemical equations use chemical formulas and other symbols.

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

Describing chemical reactions Page 23 of INB. Essential Question: What are the signs that a different substance has been formed by a reaction?

Changes of Matter Physical Change- a change that alters the appearance or form of a substance but doesn’t produce a new substance. Ex: melting ice Chemical.

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

Balancing Chemical Equations

Balancing Equations.

2-2 Balancing Chemical Equations

Describing Chemical Reactions

Law of Conservation of Mass

Balancing Chemical Equations

Describing Chemical Reactions

Types of Reactions.

Reactants and Products

Chapter 6: Chemistry in Biology

Chapter 2: Chemical Reactions

Law Conservation of Mass and Balanced and Unbalanced Equations

What Do You See? Look closely! What is its purpose?

Types of Reactions.

Types of Reactions.

2B.5 Notes Chemical equation

Chemical Equations Writing and Balancing.

Describing Chemical Reactions

Chemical Equations.

Chemical Reactions Chapter 4.1–4.2 & Ch 5.1–5.3.

Chemical equations.

Chemical Reactions Section 2.4.

Chemical Formulas and Equations Elements and Number of Atoms

Reactants are the starting substances, on the left side of the arrow.

Each element has a different symbol

Chemical Reactions Table of Contents

Chemical equations.

Chapter Highlights and Notes

7.1 Describing Reactions In a chemical reaction, the substances that undergo change are called reactants. The new substances formed as a result of that.

Balancing Chemical Equations

Chapter 7 Chemical Reactions.

Presentation transcript:

Balancing Equations Conservation of mass

- Describing Chemical Reactions What Are Chemical Equations? chemical formulas and other symbols instead of words to summarize a reaction. Reactants: substances that begin a reaction Products: substances formed in a reaction

- Describing Chemical Reactions Conservation of Mass in a chemical reaction, the total mass of the reactants must equal the total mass of the products

- Describing Chemical Reactions Balancing Chemical Equations a chemical equation must show the same number of each type of atom on both sides of the equation.

Examples HCl + Zn → ZnCl 2 + H 2 –Are the same numbers of atoms on both sides? –Which side has less of an element? 2HCl + Zn → ZnCl 2 + H 2

Balancing Equations Activity Go to my website: to practice equations. - Describing Chemical Reactions

- Controlling Chemical Reactions Energy and Reactions All chemical reactions need a certain amount of activation energy to get things started.

- Controlling Chemical Reactions Rates of Chemical Reactions The cells in your body (as in all living things) contain biological catalysts called enzymes. At the end of a reaction, an enzyme molecule is unchanged.

What increases reaction rate? (how fast a reaction will happen) Increased rate of reaction Increase in surface area Increase in temperature Increase in concentration of reactants (NOT add more of the chemical!!!!) Use of a catalystcatalyst Causes Effect - Controlling Chemical Reactions Law of conservation of mass with Brainpop