Physical Science Ms. Cilli November 29/30, 2011

Physical Science pages Interpret chemical equations in terms of reactants, products, and conservation of mass. Balance chemical equations by manipulating coefficients.

Starting this chapter I will be providing you with a basic outline for you to take notes with Hopefully it will help with retention from class to class and studying for the test You will need to need to type the notes in the document or print it and write on it It will be due prior to the test for points Starting this chapter I will be providing you with a basic outline for you to take notes with Hopefully it will help with retention from class to class and studying for the test You will need to need to type the notes in the document or print it and write on it It will be due prior to the test for points

Physical Science pages

Physical Science pages Reactants  Products Reactant is the name we give to the stuff we start out with Product is the name we give to the stuff we end up with

Physical Science pages Mass is neither created nor destroyed in a chemical reaction

Physical Science pages

Example One Cu + O 2 -> CuO ReactantsProducts Cu O

Physical Science pages Rocket fuel N 2 H 4 + O 2 -> N 2 + H 2 O Reactants Products N O H

And Another One Na + H 2 O -> NaOH + H 2 ReactantsProducts Na H O

Practice makes permanant! HCl + CaCO3 -> CaCl2 + CO2 + H2O ReactantsProducts C Cl Ca O H

Physical Science pages Got it?!?! Al + Cl 2 -> AlCl 3 Reactants Products Al Cl

Physical Science pages Balance the three equations on the next slide. You will need to complete one of the equations Call me in when you are done

Zn + HCl ---> ZnCl 2 + H 2 KClO 3 ---> KCl + O 2 S 8 + F 2 ---> SF 6 Zn + HCl ---> ZnCl 2 + H 2 KClO 3 ---> KCl + O 2 S 8 + F 2 ---> SF 6

Answers…. Zn + 2HCl ---> ZnCl 2 + H 2 2KClO 3 ---> 2KCl + 3O 2 S F 2 ---> 8SF 6

Practice Site alancing_equations_tutorial.htmhttp:// alancing_equations_tutorial.htm ng/index.htmlhttp://education.jlab.org/elementbalanci ng/index.html

1.The substances that are present before a chemical reaction takes place are called _________. A.Reactants B.Products C.Coefficients D.Elements 2.Which of the following is a balanced equation for the synthesis of NaBr from Na and Br 2 ? A.Na + Br 2  NaBr B.2Na + Br 2  NaBr C.Na + Br 2  2NaBr D.2Na + Br 2  2NaBr

Independent Practice: –Read section 7.1 –Answer the review questions and define the vocabulary words Homework: –Section 7.1 HW –Due Wednesday, November 30 th by 8PM

Independent Practice: –Read section 7.1 –Answer the review questions and define the vocabulary words Homework: –Section 7.1 HW –Due Thursday, December 1 st by 8PM