Amount of Substance Equations

Question 1

molar 1

Answer 1

n = CV

Question 2

molar 2

Answer 2

n = n° particles/ avogadros

Question 3

molar 3

Answer 3

n = v/24
v = dm3

Question 4

molar 4

Answer 4

n = m/Mr

Question 5

molar 5

Answer 5

n = PV/RT

P = pascals KPa —> Pa x1000
V = m3 cm3—>m3 x10^6
or cm3->dm3 x 1000
dm3–>m3 x1000
R = 8.314
T = °C —> K +273

Question 6

Neutralisation
Acid + Base

Answer 6

Acid + Base —> Salt + Water

Question 7

Neutralisation
Acid Alkali

Answer 7

Acid + Alkali —> Salt + Water

Question 8

Neutralisation 3
Acid + Carbornate

Answer 8

Acid + Carbonate > Salt + CO2 + H2O

Question 9

Neutralisation 4
Acid + Ammonia

Answer 9

Acid + Ammonia —> AmmoniUM salt

Question 10

% yield

Answer 10

actual yield/theoretical yield
x100

Question 11

% yield

Answer 11

work out actual moles of whatever
then do molar ratio which gives the theoretical moles
find theoretical mass (nxMr)
actual yield is given in the question
use % yield equation to fine out % yield

Question 12

% purity

Answer 12

actual mass/impure mass
x100

Question 13

% atom economy

Answer 13

Mr desired product/Mr all products

x100

Question 14

how do u improve atom economy

Answer 14

sell by products
which makes it cost less than disposal
better for environment

Question 15

% uncertainty

Answer 15

margin of error/quantity measured
x100

Question 16

General formula for alkanes

Answer 16

CnH2n+2

Question 17

General formula for Alkenes

Answer 17

CnH2n

Question 18

General formula for cycloalkanes

Answer 18

CnH2n