3.1.2 Amount Of Substance

Question 1

Sulfate

Answer 1

SO4²-

Question 2

Nitrate

Answer 2

NO3-

Question 3

Nitrite

Answer 3

NO2-

Question 4

Phosphate

Answer 4

Po4³-

Question 5

Carbonate

Answer 5

CO3²-

Question 6

Hydrogencarbonate

Answer 6

HCO3-

Question 7

Hydroxide

Answer 7

OH-

Question 8

Magnate(VII)

Answer 8

MnO4-

Question 9

Chromate (VI)

Answer 9

CrO4²-

Question 10

Dichromate

Answer 10

Cr2O7²-

Question 11

Ethanedionate

Answer 11

C2O4²-

Question 12

Ammonium

Answer 12

NH4+

Question 13

Silver

Answer 13

Ag+

Question 14

Zinc

Answer 14

Zn²+

Question 15

Cyonides

Answer 15

-CN group

Question 16

Ionic equations

Answer 16

Only ionic compounds(aquous) get split into ions

Then remove any spectator ions

Question 17

Atom ecpnomy

Answer 17

Ratio of mass of useful product to mass of total reactants (expressed as percentage)

Mr of useful/Mr of reactants ×100

Question 18

Avogardos equation

Answer 18

Moles×L= molecules

L=6.02×10²³

Question 19

Empirical Formlae

Answer 19

Represents simplistic whole number ratio of atoms in compound

(Find moles then turn into estimated whole number ratio)

Question 20

Molecular Formulae

Answer 20

Actual number of atom of each element in one molecule of the compound

Actual Mr/impirical Mr gives multiplier

Question 21

Ideal Gas Equation

Answer 21

PV=nRT

Question 22

calculate masses in Combustion Reactions

Answer 22

• find moles of CO2 and H20
  -convert to grams to find mass of oxygen in compound
  -then find empirical formulae
  OR
• find mole ratio of Carbon and Hydrogen
  -guess the formulae from Mr

Question 23

Boyle’s Law

Answer 23

while Temp is constant

volume is inversely proportianal to to pressure

Question 24

Charles’s Law

Answer 24

at constant Pressure

Volume is directly proportianal to Temprature

Question 25

Absolute 0

Answer 25

0Kelvin

or -273 Celcius