Amount Of Substance

Question 1

What are the 6 important polyatomic ions?

Answer 1

•Hydroxide
•Carbonate
•Nitrate
•Sulfate
•Phosphate
•Ammonium

Question 2

Hydroxide formula

Answer 2

OH -

Question 3

Carbonate formula

Answer 3

CO3 ^2-

Question 4

Nitrate formula

Answer 4

NO3 -

Question 5

Sulfate formula

Answer 5

SO4 ^2-

Question 6

Phosphate formula

Answer 6

PO4 ^3-

Question 7

Ammonium formula

Answer 7

NH4 +

Question 8

Ammonia vs ammonium

Answer 8

Ammonia (atom): NH3
Ammonium (ion: NH4 +

Question 9

Phosphorus formula

Answer 9

P4

Question 10

Sulphur formula

Answer 10

S8

Question 11

Hydride formula

Answer 11

H-

Question 12

What kind of substances are acids? 4 main ones? Formulas?

Answer 12

Ionic compounds
HCl (hydrochloric)
H2SO4 (sulphuric)
HNO3 (nitric)
H3PO4 (phosphoric)

Question 13

Hydrogen carbonate vs carbonic acid formula

Answer 13

Hydrogen carbonate: HCO ^3-
Carbonic acid: H2CO3

Question 14

4 reasons high atom economy is favourable?

Answer 14

• less waste
• better for environment
• cheaper (smaller disposal cost)
• more sustainable- less raw materials needed

Question 15

3 reasons why % yield is not 100%?

Answer 15

• reversible reactions
• lost in separation
• side reactions

Question 16

How many sig fig should answer be when you’re NOT only adding/subtracting?

Answer 16

The least precise number the data uses

Question 17

How many sig fig should answer be when you’re ONLY adding/subtracting?

Answer 17

Nearest unit if the data are integers
Least precise number the data uses if not integers

Question 18

Define relative molecular mass

Answer 18

The average mass of a molecule DIVIDED BY a 1/12th the mass of a carbon 12 ATOM

Question 19

Define Avogadro’s number

Answer 19

The number of atoms in 12g of carbon 12

Question 20

% yield formula

Answer 20

(actual mass / theoretical mass) x 100

Question 21

% atom economy formula

Answer 21

(mass of desired / total mass of products) x 100

Question 22

Ideal gas equation

Answer 22

pV=nRT