Launch: 11/13
  Grab your binder and immediately take a seat!
1.  How many of each atom are in the following molecules:
 ...
Announcements
  Binder checks are worth a decent number of
  points!

  It is really important that you
    Do your lau...
What are chemical
   equations?
      Mr. Heffner
      11/13/09
What are chemical equations?
    A chemical equation is…
       a representation of a chemical reaction


              ...
What are chemical equations?
  A chemical equation is…
    a representation of a chemical reaction


            2H2 + O...
What are chemical equations?
    A chemical equation is…
      a representation of a chemical reaction


               ...
Example
1.  How many H atoms does 2H2 have?
    multiply the subscript and the coefficient
       Coefficient = 2
     ...
Example
2.  How many H atoms does 2H2O have?
    multiply the subscript and the coefficient
       Coefficient = 2
     ...
Example
3.  How many O atoms does 2H2O have?
    multiply the subscript and the coefficient
       Coefficient = 2
     ...
Example
4.  How many O atoms does Mg(OH)2 have?
    multiply the subscript and the coefficient
       Coefficient = not ...
Foldable
  Make foldable and define terms. Draw an
   illustration if necessary.
  1.  Chemical equation
  2.  Reactants
...
Practice Question
  Practice question handout
Exit Slip
1.  What are chemical equations?
   a.  Representations of chemical reactions in which the
      reactants are l...
Exit Slip
  HC2H3O2 + NaHCO3  NaC2H3O2 + H2CO3
2.  Which of the following correctly identifies all of
   the reactants in...
Exit Slip
          4Na + 4H2O  4NaOH + 2H2
3.  Which of the following identifies the coefficient for
   H2O in the above...
Exit Slip
4.  How many C atoms are there in 3C2H4?
  a.    2
  b.    3
  c.    5
  d.    6
Exit Slip
5.  Which of the following identifies the correct
   number of atoms in 3H2SO4?
  a.  3 H atoms, 3 S atoms, 3 O ...
Homework
  Finish practice question worksheet
11 13 What Is A Chemical Equation
Upcoming SlideShare
Loading in …5
×

11 13 What Is A Chemical Equation

862 views

Published on

Published in: Technology, Business
1 Comment
1 Like
Statistics
Notes
  • The presentation is good.
    can we add more information about the topic?
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
862
On SlideShare
0
From Embeds
0
Number of Embeds
6
Actions
Shares
0
Downloads
46
Comments
1
Likes
1
Embeds 0
No embeds

No notes for slide

11 13 What Is A Chemical Equation

  1. 1. Launch: 11/13   Grab your binder and immediately take a seat! 1.  How many of each atom are in the following molecules: i.  Br2 ii.  H2S iii. CCl4 iv.  H2SO4 v.  C6H12O6
  2. 2. Announcements   Binder checks are worth a decent number of points!   It is really important that you   Do your launches   Finish your homework (and get a stamp)   Make-up all work from absences   lpschem.wordpress.com
  3. 3. What are chemical equations? Mr. Heffner 11/13/09
  4. 4. What are chemical equations?   A chemical equation is…   a representation of a chemical reaction 2H2 + O2  2H2O Reactants Products •  The substances that react •  The substances that •  Left are produced (made) •  Right
  5. 5. What are chemical equations?   A chemical equation is…   a representation of a chemical reaction 2H2 + O2  2H2O Reaction Arrow •  “turns into” •  like an equals (=) sign
  6. 6. What are chemical equations?   A chemical equation is…   a representation of a chemical reaction 2H2 + O2  2H2O Coefficients Subscripts •  Comes before the •  Comes after the atom compound •  Sub = below •  distributed to all
  7. 7. Example 1.  How many H atoms does 2H2 have?   multiply the subscript and the coefficient   Coefficient = 2   Subscript = 2   2 X 2 = 4 hydrogen atoms
  8. 8. Example 2.  How many H atoms does 2H2O have?   multiply the subscript and the coefficient   Coefficient = 2   Subscript = 2   2 X 2 = 4 hydrogen atoms
  9. 9. Example 3.  How many O atoms does 2H2O have?   multiply the subscript and the coefficient   Coefficient = 2   Subscript = not there = 1   2 X 1 = 2 oxygen atoms
  10. 10. Example 4.  How many O atoms does Mg(OH)2 have?   multiply the subscript and the coefficient   Coefficient = not there = 1   Subscript = 2   1 X 2 = 2 oxygen atoms
  11. 11. Foldable   Make foldable and define terms. Draw an illustration if necessary. 1.  Chemical equation 2.  Reactants 3.  Products 4.  Coefficient 5.  Subscript 6.  Chemical reaction 7.  Chemical bond 8.  Molecule/compound
  12. 12. Practice Question   Practice question handout
  13. 13. Exit Slip 1.  What are chemical equations? a.  Representations of chemical reactions in which the reactants are listed to the left of a reaction arrow. b.  Representations of chemical bonds in which 2 valence electrons are depicted by a straight line c.  Representations of chemical reactions in which the. products are listed to the left of the reaction arrow. d.  A way to show how reaction arrows turn into reactants.
  14. 14. Exit Slip HC2H3O2 + NaHCO3  NaC2H3O2 + H2CO3 2.  Which of the following correctly identifies all of the reactants in the above chemical equation. a.  NaC2H3O2 b.  NaHCO3 c.  NaC2H3O2 and HC2H3O2 d.  HC2H3O2 and NaHCO3
  15. 15. Exit Slip 4Na + 4H2O  4NaOH + 2H2 3.  Which of the following identifies the coefficient for H2O in the above chemical equation? a.  1 b.  2 c.  4 d.  8
  16. 16. Exit Slip 4.  How many C atoms are there in 3C2H4? a.  2 b.  3 c.  5 d.  6
  17. 17. Exit Slip 5.  Which of the following identifies the correct number of atoms in 3H2SO4? a.  3 H atoms, 3 S atoms, 3 O atoms b.  2 H atoms, 1 S atom, 4 O atoms c.  6 H atoms, 3 S atoms, 4 O atoms d.  6 H atoms, 3 S atom, 12 O atoms
  18. 18. Homework   Finish practice question worksheet

×