It is not the manof great native talentwho wins but hewho pushes his talent, however small, toit’s utmost capacity.

Science Paper BooBoosThese are actual quotes from submissions to science teachers "When you breath, you inspire. When you do not breath, you expire.“ "H2O is hot water, and CO2 is cold water"

"When you smell an oderless gas, it is probably carbon monoxide“ "Water is composed of two gins, Oxygin and Hydrogin. Oxygin is pure gin. Hydrogin is gin and water."

Is It what you think?Is It what you think?

Balancing Equations

Part 2

Types of Chemical reactions:

• Synthesis or combination reaction - the combining of two or more reactants to form one product.

• Ex: A + B ---> AB

• Ex: 2H2 + O2 ----> 2H2O

• Decomposition reaction - the breaking apart of one compound into two or more simpler substances.

• Ex: AB ---> A + B

• Ex: NH4NO3 ----> N2O + 2H2O

• Single Replacement - One element takes the place of another in a compound.

• Ex: AX + B ---> A + BX

• Ex: Fe + CuSO4 ----> FeSO4 + Cu (Iron is more reactive than copper so reaction takes place.)

• The Following chart list the metal reactivity. (See next slide)

• Note: Li is the most reactive and Gold the least active.

Metal Activity Chart

LiKBaSrCaNa

MgAlMnZnCr

Most Active FeCdCoNiSn

Pb HCu

BiSbHgAgPtAu

Least Active

• Double Replacement - Two compounds exchanging partners.

• Ex: AX + BY -----> BX + AY

• Ex: FeSO4 + CaCl2 ------> FeCl2 + CaSO4

Combustion Reaction - one of the reactants is oxygen and the two products are water and carbon dioxide.

Ex: CH4 (g) + 2O2 (g) ----> CO2 (g) + 2H2O(g)

Barking Dog

•Balance the following equations and then tell what type of reaction they are.

Problem:

1. Carbon monoxide reacts with oxygen to form carbon dioxide.

2. Silver reacts with Chlorine

what is the product?

Answers

• They are both synthesis

Problem:

• 3. Magnesium oxide reacts with Iron to produce Iron II oxide and magnesium.

• 4. Propane reacts with oxygen in to produce water and carbon dioxide.

Answers

• 3. Single replacement

• 4. Combustion reaction

Problem:

5. Barium chloride reacts with sodium phosphate to form barium phosphate and sodium chloride.

6. Potassium chlorate decomposes into potassium chloride and oxygen.

Answers:

• 5. Double Replacement

• 6. Decompositions reaction

Will the following reactions occur? If so balance.

• 7. LiCl combines with Strontium

• 8. Gold I Chloride combines with Barium

Answers

• 7. No : Lithium is more reactive than strontium.

• 8. Yes: because Barium is more reactive than Gold.