Question

Title: Balancing Chemical Equations How do you know if you have a balanced equation? Do the following actions and fill in the table below: Action Balanced Equation Particle View (center of screen) Steps you took to make the equation balanced Make Ammonia N2 + 3H2 → 2NH3 Separate Water 2H2O → 2H2 + O2 Combust Methane CH4 + 2O2 → CO2 + 2H2O In each of the following items above, a different verb was used. Based on the reaction, how would you define the following verbs? Word My definition Make To create or produce Separate To divide or break apart Combust To burn or react with oxygen Part II Balance the following equations: a) C2H6 + 7O2 → 2CO2 + 3H2O b) As4 + 5O2 → 2As2O5 c) H2 + Cl2 → 2HCl d) 2KI + Br2 → 2KBr + I2 Balance and classify chemical reactions: (Remember that reactions may belong to more than one category.) KClO3 (s) → KCl (s) + 3O2 (g) - Decomposition reaction 4Fe + 3O2 → 2Fe2O3 - Combination reaction HBr + KOH → KBr + H2O - Acid-base reaction Zn (s) + 2Al(NO3)3 → 3Zn(NO3)2 + 2Al (s) - Displacement reaction A reaction (Remember that reactions can belong to more than one category.) Pb(NO3)2 (aq) → PbO2 + 2NO2 (g) can be classified as a redox reaction. Write the total and net ionic equation for a reaction: NaCl (aq) + AgNO3 (aq) → NaNO3 (aq) + AgCl(s) Total: NaCl (aq) + AgNO3 (aq) → NaNO3 (aq) + AgCl(s) Net: Ag+ (aq) + Cl- (aq) → AgCl(s) Balance: 4Al + 3O2 → 2Al2O3 To balance an equation like: C8H18 + 12.5O2 → 8CO2 + 9H2O You need a coefficient in front like: 2C8H18 + 25O2 → 16CO2 + 18H2O When an acid combines with a base, the reaction is called a neutralization reaction. Balance with appropriate coefficients: 2NaCl + BeF2 → 2NaF + BeCl2 2FeCl3 + 3Be3(PO4)2 → 6BeCl2 + Fe3(PO4)2 3AgNO3 + 3LiOH → 3AgOH + LiNO3 CH4 + 2O2 → CO2 + 2H2O 3Mg + Mn2O3 → MgO + 2Mn

          Title: Balancing Chemical Equations

How do you know if you have a balanced equation? Do the following actions and fill in the table below:

Action Balanced Equation Particle View (center of screen) Steps you took to make the equation balanced 

Make Ammonia N2 + 3H2 → 2NH3 
Separate Water 2H2O → 2H2 + O2 
Combust Methane CH4 + 2O2 → CO2 + 2H2O 

In each of the following items above, a different verb was used. Based on the reaction, how would you define the following verbs?

Word My definition 

Make To create or produce 
Separate To divide or break apart 
Combust To burn or react with oxygen 

Part II

Balance the following equations:

a) C2H6 + 7O2 → 2CO2 + 3H2O 
b) As4 + 5O2 → 2As2O5 
c) H2 + Cl2 → 2HCl 
d) 2KI + Br2 → 2KBr + I2 

Balance and classify chemical reactions: (Remember that reactions may belong to more than one category.)

KClO3 (s) → KCl (s) + 3O2 (g) - Decomposition reaction 
4Fe + 3O2 → 2Fe2O3 - Combination reaction 
HBr + KOH → KBr + H2O - Acid-base reaction 
Zn (s) + 2Al(NO3)3 → 3Zn(NO3)2 + 2Al (s) - Displacement reaction 

A reaction (Remember that reactions can belong to more than one category.)

Pb(NO3)2 (aq) → PbO2 + 2NO2 (g) can be classified as a redox reaction.

Write the total and net ionic equation for a reaction:

NaCl (aq) + AgNO3 (aq) → NaNO3 (aq) + AgCl(s)
Total: NaCl (aq) + AgNO3 (aq) → NaNO3 (aq) + AgCl(s)
Net: Ag+ (aq) + Cl- (aq) → AgCl(s)

Balance: 4Al + 3O2 → 2Al2O3

To balance an equation like:
C8H18 + 12.5O2 → 8CO2 + 9H2O
You need a coefficient in front like:
2C8H18 + 25O2 → 16CO2 + 18H2O

When an acid combines with a base, the reaction is called a neutralization reaction.

Balance with appropriate coefficients:
2NaCl + BeF2 → 2NaF + BeCl2
2FeCl3 + 3Be3(PO4)2 → 6BeCl2 + Fe3(PO4)2
3AgNO3 + 3LiOH → 3AgOH + LiNO3
CH4 + 2O2 → CO2 + 2H2O
3Mg + Mn2O3 → MgO + 2Mn

Added by Justin G.

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