Paper 1 key knowledge

Question 1

m/z value equation.

Answer 1

mass of ion/ charge of ion

Question 2

concentration equation

Answer 2

n=cv, v=24n

Question 3

RTP

Answer 3

101 kPa, 293K, 1 moldm3

Question 4

Ideal gas law equation.

Answer 4

pV=nRT
p=pressure (Pa)
V= volume (m3)
n= moles
R= 8.314
T= temp (K)

Question 5

Percentage yield equation

Answer 5

actual yield/ theoretical yield x 100

Question 6

Limiting reagant definition

Answer 6

The reactant that is not in excess
Has a larger number of moles

Question 7

Atom economy equation

Answer 7

Sum of Mr of desired products/ Sum of Mr of all products x 100

Question 8

Strong acid definition

Answer 8

ccCompletely dissociates into aqeous solution and releases all of it hydrogen ions

Question 9

Weak acid defintion

Answer 9

Only partially dissociates into solution

Question 10

Reduction defintion

Answer 10

Gains electrons
Reduced oxidation number#
Vice versa for oxidation

Question 11

Order of electrons in shells

Answer 11

1s2 2s2 2p6 3s2 3p9 4s2 3d10 4p6

s=2
p=6
d=10

Question 12

Why does 4s fill before 3d

Answer 12

Because it has a lower energy level