Chemical Equations ! !.

Slides:

Advertisements

Similar presentations

Chemical Equations. When chemicals are added together and a reaction occurs a chemical equation can be written The reactants go on the left of the equation.

Advertisements

+ DOR: What’s in a name? Write the element symbol WITHOUT the periodic table 1) Lithium6) Magnesium 2) Fluorine7) Lead 3) Oxygen8) Manganese 4) Copper9)

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.

Atom Inventory Notes and Pictures. How many atoms of each element are there on each side of the of the equation? What should be true about the number.

Chapter 8 Chemical reactions Chemical Reaction Represents a chemical change Reactants products When a chemical change occurs the products have a different.

What are chemical formulas? What can a chemical formula tell us? Number of atoms of a particular element present in a chemical compound – Ex. CO 2, NO.

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

 Law of Conservation of Matter:  Matter cannot be created or destroyed.  AMOUNT OF REACTANTS = AMOUNT OF PRODUCTS ! ! ! !

 Law of Conservation of Matter:  Matter cannot be created or destroyed.  AMOUNT OF REACTANTS = AMOUNT OF PRODUCTS ! ! ! !

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

11-4 Homework11-4 Homework 1)Nickel (II) Phosphate 2)Silver bromide 3)Tin (IV) chloride 4)Ammonium sulfide 5)Mercury (II) fluoride 6)Magnesium nitride.

Classwork 1)Nickel (II) Phosphate 2)Silver bromide 3)Tin (IV) chloride 4)Ammonium sulfide 5)Mercury (II) fluoride 6)Magnesium nitride 7)Bismuth iodide.

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 Equations & Reactions

Unit 4 – Chemical Equations & Reactions

Balancing Chemical Equations

Law of Conservation of Mass

Balancing Chemical Equations

Counting Atoms and Balancing Chemical Equations

Chemical Equations and Conservation of Mass

“Balancing Chemical Equations”

Balancing Chemical Equations

Balancing Equations Section 7.3 in Textbook.

Balancing Chemical Equations

Topic: Names, Formulas, Equations, & Reactions

Balancing, States of Matter, and Writing

Balancing, Writing, and Naming Equations

Chemical Equations Pb(NO3)2 + 2 KI PbI2 + 2 KNO3.

6.4 Chemical Reactions Obj 3; 5

II. Balancing Equations

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

Introduction to Balancing Equations

Balancing Equations Review

Balancing Chemical Formulas

Test #3 Review Questions

Law of Conservation of Mass

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.

Law of Conservation of Mass

Law of Conservation of Mass:

Balancing Chemical Equations

Counting Atoms and Balancing Equations

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

Balancing and writing equations

Balancing Equations.

FORMING NEW SUBSTANCES

Balancing Chemical Equations

FORMING NEW SUBSTANCES

Chemical Reactions and Law of Conservation of Mass

Law of Conservation of Mass and Chemical Equations

Balancing equations.

Balancing Chemical Equations

Balancing Chemical Reactions

Balancing, Writing, and Naming Equations

Balancing Chemical Equations

Chemical Formulas Coefficient Subscript #of molecules 5CO2 #of atoms.

Glencoe Physical Science Chapter 21

Chemical Reactions Section 2.4.

What is the Law of Conservation of Mass?

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.

Chapter 7 Chemical reactions can be described in words, but it is common practice to represent chemical reactions with ‘equations’. Equations are simply.

Balancing Chemical Equations

Balancing Chemical Equations

Balancing Chemical Equations

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

Warm Up What is a Physical Change? What is a Chemical Change?

Presentation transcript:

Chemical Equations ! !

Law of Conservation of Matter: Matter cannot be created or destroyed. AMOUNT OF REACTANTS = AMOUNT OF PRODUCTS ! ! ! !

Guidelines for Balancing Chemical Equations: 1) Do NOT change the subscripts ! 2) Every element MUST have the same amount of atoms on both sides of the equation. 3) To balance, coefficients (numbers) are added in front of the chemical formula until we have the same atom amount on both sides of the equation. Must talk to yourself while balancing.

Guidelines for Balancing Chemical Equations: (cont.) 4) Once a coefficient is added, go back and check the rest of the equation 5) Balance every element EXCEPT Hs and Os. Then balance Hs, Os are balanced last. Balance Hs with an EVEN number 6) CHECK EQUATION TO BE SURE EVERYTHING BALANCES/CANCELS OUT ON BOTH SIDES ! ! !

Example 1: Mg + HCl è MgCl2 + H2

Example 2: KI (aq) + Pb(NO3)2 è KNO3 + PbI2

Example 3: FeI3 + K2SO4 è KI + Fe2(SO4)3

Practice 1) Zn + CrCl3 è CrCl2 + ZnCl2 2) Cu + H2SO4 è CuSO4 + SO2 + H2O 3) LiAlH4 + H2O è LiOH + Al(OH)3 + H2 4) CaSO4 + Al(NO3)3 è Ca(NO3)2 + Al2(SO4)3