Your SlideShare is downloading. ×
5-2 Balancing Reactions
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

5-2 Balancing Reactions

309
views

Published on

Published in: Education, Technology, Business

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
309
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
3
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
  • Fe + O2 Fe2O3
  • Transcript

    • 1. 5-2 Balancing Chemical Eq.
      • Objectives:
        • Balance chemical equations by manipulating coefficients.
    • 2. Steps to balancing equations
      • Count the number of atoms or groups of atoms on each side of arrow.
      • Change one or more coefficients until the equation is balanced.
      • N 2 H 4 + O 2  N 2 + H 2 O
    • 3. H 2 + O 2  H 2 O
      • Only 1 oxygen atom “out” (2 “in”)
      H - 2 Only 2 hydrogen “in” (4 “out”) Recount total number of each type of atom 2 2 * Only add coefficients, NEVER Δ subscripts Can you ever make just 1 molecule of water? O - 2 H – 2 O – 1 H – 2 4 O – 1 2 2 ( ) coefficient subscript
    • 4. NaOH  Na 2 O + H 2 O
      • Only 1 sodium atom “in” (2 “out”)
      Recount total number of each type of atom 2 Na – 1 O – 1 H – 1 Na – 2 O – 1 H – 2 O – 1 2 ( ) Na – 1 2 O – 1 2 H – 1 2
    • 5. Order of balancing
      • Polyatomic
      • Metals
      • Nonmetals
      • Hydrogen
      • Oxygen
    • 6. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • Na + H 2 O  NaOH + H 2
    • 7. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
    • 8. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
    • 9. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • 2 HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
    • 10. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • 2 HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
      • Al + Cl 2  AlCl 3
    • 11. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • 2 HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
      • 2 Al + 3 Cl 2  2 AlCl 3
    • 12. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • 2 HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
      • 2 Al + 3 Cl 2  2 AlCl 3
      • K 2 CrO 4 + Pb(NO 3 ) 2  PbCrO 4 + KNO 3
    • 13. Balancing equation
      • To show mass is conserved, chemical equation must be balanced.
      • 2 Na + 2 H 2 O  2 NaOH + H 2
      • 2 HCl + CaCO 3  CaCl 2 + CO 2 + H 2 0
      • 2 Al + 3 Cl 2  2 AlCl 3
      • K 2 CrO 4 + Pb(NO 3 ) 2  PbCrO 4 + 2 KNO 3