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 + H_{2}SO_{4}

FeS + HCl

NaCl + H_{2}SO_{4}

AgNO_{3} + 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. H_{2}SO_{4} + 2 NH_{4}OH

c. 2 NaOH + H_{2}CO_{3}

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