Naming and Math

When writing which type of compound do you write prefixes?

Covalent compounds

What is the prefix for covalent compound naming 1-10?

1. Mono

2. Di

3. Tri

4. Tetra

5. Penta

6. Hexa

7. Hepta

8. Octa

9. Nona

10. Deca

What are the prefixes used when naming carbons in organic molecules?

1. Meth

2. Eth

3. Prop

4. But

5. Pent

6. Hex

7. Hept

8. Oct

9. Non

10. Dec

What are the naming rules for Covalent Compounds?

• no mono on first element

• Drop the a’ on the prefix followed by an O in the element

• First element does not get a new suffix, but the second element does get the -ide as normal

Which elements need a Roman numeral in their name?

• Chromium

• Cobalt

• Copper

• Iron

• Manganese

• Nickel

• Lead

• Silver

• Tin

• Zinc

What do the Roman numerals represent?

The elements charge

How many atoms is in one mole?

6.02 × 10²³

How many ions is in one mole?

6.02 × 10²³

A mole is also known as what?

Avogadro’s number

How many molecules is in one mole?

6.02 × 10²³

What is ‘the Mr’ known as and what is it?

Relative formula mass, which is the mass of one mole of a compound

What is the unit for Mr and how do you calculate it??

g/mol, which is calculated by multiplying the atomic mass of each element by the number of atoms present

How do you find the percent composition of elements?

1. Calculate Mr

2. Divide each element Mr into the total Mr

3. Round percent to 3 significant figures

4. Multiplied by 100

How do you check your work to make sure you have the correct percent compositions?

Add all of the percentages, which should equal 100; 0.2 margin

How do you calculate percent error?

| Experimental value— Theoretical value| / Theoretical value x 100

What is the experimental value?

What got measured or what you got from the experiment

What is the theoretical value?

What you’re supposed to get/Reference/The answer

What are keywords that indicate gas?

Gas, gases, vapor, bubbles, ‘pop’, ‘fizz’

What Keywords indicate solid?

Solid, crystals, powder, grains, gravels, pebbles, pallets, shavings, ribbon, turnings

What is a precipitate?

A solid that forms in water and is insoluble “falls out of solution”

What does aq mean?

Aqueous-Dissolved in water; solution; soluble

Which of the seven diatomic elements is liquid when standing alone?

Bromine

What does it mean when there’s a triangle above the reaction arrow?

Heat, combustion, Burnt

What is never aqueous?

H2O

What does it mean when there is elec. above the reaction arrow?

Electricity

What does it mean when there is P+/Ni above the reaction arrow?

They are catalysts

What are the seven diatomic molecules?

• Hydrogen

• Nitrogen

• Oxygen

• Fluorine

• Chlorine

• Bromine

• Iodine

What is the formula of a synthesis/ Combination reaction?

A + B —> AB

What is the formula of a decomposition reaction?

AB —triangle—> A +B

What is the formula of a combustion reaction?

CH + OO —> C (two O’s branch off) + O (two H’s branch off)

What is the formula of a single replacement/single displacement reaction?

A + BC —> AC + B

What is the formula for a double replacement/ double displacement reaction?

AB + CD —> AD + CB

• One of those products is always a gas water or precipitate