Balancing Chemical Equations

Fill in the missing part(s) of the rule for balancing equations below:

Write correct  formula for all _____ to left of arrow & all _____ to right.

• reactants

  products

• products

  reactants

• production

  reaction

Tags

NGSS.HS-PS1-7

Fill in the missing part(s) of the rule for balancing equations below:

• Use _____ to  balance equation.  ( large _____ in front  of formula)

•   the coefficient goes with everything that comes _____ it until (+) or ( ---> )

• • coefficients

  • number

  • after

• reactants

  symbol

  after

• coefficients

  number

  before

Fill in the missing part(s) of the rule for balancing equations below:

balance by _____ … usually leave the _____ until last

• • trial and error

  • H and O

• • guessing

  • number

• • using the formula

  • chemicals

Fill in the missing part(s) of the rule for balancing equations below:

multiply _____ by the _____ of element to determine number of _____ or _____.

• • coefficient

  • subscript

  • atoms

  • ions

• • reactant

  • amount

  • electrons

  • protons

Tags

NGSS.HS-PS1-7

• _______ change the subscript to balance!

• • NEVER

• ALWAYS

• 2(NH₄)₃PO₄  =

• • 4NH₄+  and   6 PO₄

• • 6 NH₄+  and   2 PO₄ ^-3

• • 6 NH₄+  and   3 PO₄ ^-3

• • 6 NH_-4+  and   2 PO₄ ^-3

Tags

NGSS.HS-PS1-7

If a polyatomic ion appears unchanged on both sides of an equation, then count it as a single unit.

• TRUE

• FALSE

Tags

NGSS.HS-PS1-7

AgNO₃ + Cu ---> ?

• • Cu(NO₃)₂ + Ag

• • Cu(NO₂)₃ + Ag

• • Cu(NO₃)₃ + Ag

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

2AgNO₃ + Cu →

• CuNO₃ + Ag

• Cu(NO₃)₂ + 2Ag

• Cu(NO₃)₂ + 2Ag

Al + O₂ ---> Al₂O₃

• 3Al + 2O₂ ---> Al₄ O₃

• 4Al + 3O₂ ---> 2Al₂O₃

• 2Al + 3O₂ ---> Al₄O₃

Tags

NGSS.HS-PS1-7