Chemical Reactions

How do you know a chemical reaction has taken place?

Evidence of chemical reactions

When mixing 2 chemicals together – how do you know if a reaction occurs?

Create a gas Change color Releases heat (feels hot) or absorbs heat

(feels cold) Create a precipitate (solid made from 2

clear liquids)

Demo Day Reactions

Copy each chemical equation.Balance & Classify each equation.

H2O2 ----> H2O + O2

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

MnO2

Mg + HCl H2 + MgCl2 + heat

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

Mg + O2 MgO + light

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

Cu + AgNO3 CuNO3 + Ag

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

Pb(NO3)2 + KI KNO3 + PbI2

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

HC2H3O2 + NaHCO3 NaC2H3O2 + H2O + CO2

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

Ba(OH)2 + NH4Cl NH3 + H2O + BaCl2

Copy:

Write the phases of matter Balance Evidence of a chemical reaction

CH4 + O2 CO2 + H2O

Copy:

Write the phases of matter Balance Classify Evidence of a chemical reaction

http://www.youtube.com/watch?v=gXcug7RqPgs

Al + HCl

Copy:

Predict the products Write the phases of matter Balance Classify Evidence of a chemical reaction