Your SlideShare is downloading. ×
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Balancing equations
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Balancing equations

745

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
745
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Balancing Chemical Equations
  • 2. Law of Conservation of Matter
    • “ Matter is neither created nor destroyed, only changed from one form to another.”
  • 3. LCM continued
    • Every reaction that takes place in nature or in the laboratory must have the same number of atoms on both sides of the equation, or is BALANCED!
  • 4. ANATOMY OF AN EQUATION
    • Letter in parenthesis tells state of matter
    • notice H and O with their subscripts…
    • why???
    H 2 (g) + O 2 (g) H 2 O(l) reactants yield products
  • 5. DIATOMIC ELEMENTS
    • In nature, diatomic elements contain two atoms bonded together, hence di- prefix.
    • When written by themselves , always get a subscript 2.
    • Which ones are diatomic???
  • 6. these are the diatomics
  • 7. BALANCING EQUATIONS
    • Atom inventory of the whole equation
    • Balance atoms by adding coefficients!
    • You cannot add or change subscripts!!!
    RULES: (1) save O and H till the end (2) use least common multiple to get numbers equal (3) start with oddest combination or biggest difference
  • 8. Sample Problems
  • 9. Cu(s) + O 2 (g) Cu 2 O(s) Cu O 1 2 2 1 2 1 2 1 2 2 balanced!!! 4 4 4
  • 10. K(s) + N 2 (g) K 3 N(s) K N 1 2 3 1 3 1 3 2 1 2 6 6 6 BALANCED
  • 11. Al(s) + HCl(aq) AlCl 3 (aq) + H 2 (g) Al H Cl 1 1 1 1 2 3 3 1 3 3 6 3 6 6 6 2 6 2 2 2 BALANCED
  • 12. Co(s) + O 2 (g) Co 2 O 3 (s) Co O 1 2 2 3 2 1 2 3 2 6 6 4 4 4 BALANCED
  • 13. Al 2 O 3 (s) + C(s) Al(s) + CO 2 (g) Al O C 2 3 1 1 2 1 2 2 2 3 6 6 4 3 3 3 4 BALANCED 4
  • 14. AgNO 3 (aq) + H 2 S(aq) Ag 2 S(s) + HNO 3 (aq) Ag N O H S 1 1 3 2 1 2 1 3 1 1 2 2 2 6 2 2 2 6 1 1 BALANCED

×