Balancing Chemical Equations

Presentation

•

Chemistry

•

10th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-5

Standards-aligned

Katherine Morris

Used 686+ times

FREE Resource

12 Slides • 2 Questions

Balancing Chemical Equations

Fall 2020

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REMEMBER

# of each element in reactants

MUST EQUAL

# of each element in products

2Al₂(CO₃)₃

Al: 4 because 2 x 2 = 4
C: 6 because 2 x 3 = 6
O: 18 because 3 x 3 x 2 = 18

A few hints:

Water can often be split into H + OH, but not always
Save O for last in a reaction that produces CO2 + H₂O
Polyatomics can be left as one thing if it appears on both sides of the yield
Balance everything other than O and H first
Try to get rid of odd numbers first

Practice Problems

Number your paper 1 - 7

___ H₂ + ___ O₂ → ___H₂O

Balance this equation.

___SiO₂ + ___C → ___Si + ___CO

Balance this equation.

__AgNO₃ + __MgCl₂

→

__AgCl + __Mg(NO₃)₂

Balance this equation.

___H₂SO₄ + ___NaOH

→

___Na₂SO₄ + ___H₂O

Balance this equation.

__C₃H₈ + __O₂ → __CO₂ + __H₂O

Balance this equation.

__C₈H₁₈ + __O₂ → __CO₂ + __H₂O

Balance this equation.

Multiple Choice

Which of the pictures below shows a balanced representation of

H₂ + O₂ → H₂O?

Balancing Chemical Equations

Fall 2020

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