Double Replacement, Neutralization, and Combustion - Feb. 2, 2011 Isabelle Cheng

Isabelle Cheng

Feb. 2, 2011

Block 2-2 Chemistry 11

Ms. Chen

Double Replacement, Neutralization, and Combustion

These are all types of Reaction Types:

  

Double Replacement is where there is a compound with a compound. It is where the positive ions in compounds switch places. The formula is AB+CD = CB + AD. This is what the order turns out after it is switched. 

For example: 

Given Formula =  AgNO3 + NaCl 

Now change it into the double replacement formula = NaNO3 + AgCl

Looking at the periodic- make sure that the formula is correct:

AgNO3 + NaCl -------> NaNO3 + AgCl 

Now since you have the double replacement formula you have to balance the equation.

1AgNO3 + 1NaCl -------> 1NaNO3 + 1AgCl

Now you have a perfectly balanced double replacement! 

Some other exercises for double replacement!

KOH + H₂SO₄ 

FeS + HCl 

NaCl + H₂SO₄ 

AgNO₃ + NaCl 

Neutralization is a special case of double replacement. It is where a acid and base are combined. The water is a substance and the ones that are left over combine to have salt. The formula usually includes OH and H. 

For example:

Given Formula = H2SO4 + NaOH 

Now change it into the neutralization formula = Na2SO4 + 2 H2O

Looking at the periodic- make sure that the formula is correct:

H2SO4 + NaOH -------> Na2SO4 + H2O

Now balance the equation:H2SO4 + NaOH  -------> Na2SO4 + 2 H2O

Now you have balanced a neutralization reactant equation! 

Here are some more examples and practice on neutralization equations:

a. HCl + NaOH

b. H₂SO₄ + 2 NH₄OH

c. 2 NaOH + H₂CO₃ 

Combustion is where there is a substance of where the formula begins with a “C” and a 02. For example, the formula includes CO2 + H20. 

For Example:

Given formula: C5H12 + 8 O2 

Now change it into the combustion formula = CO2 + H2O

Looking at the periodic- make sure that the formula is correct.

Balanced - C5H12 + 8O2 ----> 5CO2 + 6 H20

Now you have balanced the combustion reactant equation!

Some more practice on combustion equations!

1. ____CH4 + ____O2 

2. ____C10H22 + ____O2 

3. ____CH3OH + ____O2 

4. ____C12H22O12 + ____O2