list of objectives (FA4)

Question 1

what does STP stand for?

Answer 1

standard temperature and pressure

0°C = 273K
101.3 kpa
1 mol: 22.4L

Question 2

what does RTP (SLC) stand for?

Answer 2

Room/Lab Temperature and Pressure

25°C = 298k
101.3 kpa
1 mol : 24.5L

Question 3

what’s the formula for concentration?

Answer 3

c = n/v
or
C1V1 = C2V2

Question 4

what’s the formula for either moles or mass?

Answer 4

n = m/m.m
m = n x m.m

Question 5

what’s the pH equation?

Answer 5

pH = -log[H+]

Question 6

what’s the hydrogen ion concentration equation?

Answer 6

[H+] = 10^-pH

Question 7

what is the cause of the size and bond angle in various covalent molecules? (VESPR)

Answer 7

Lone pair repulsion, the angle of a bond is affected by the presence of lone pair of electrons at the central atom. A lone pair tries to repel bond pair resulting in the decrease of bond angle.

Question 8

what’s the relationship between lone pairs and bond angles?

Answer 8

number of lone pairs up = bond angle down

Question 9

what factors causes the boiling point of particular ionic or covalent compound?

Answer 9

intermolecular bonding, weight and dispersion forces

Question 10

what’s the formula for either pressure, volume or temperature?

Answer 10

PV = nRT

Question 11

what value does the gas law constant R have?

Answer 11

8.314 J/Mol

Question 12

what does HPLC stand for?

Answer 12

High Performance Liquid Chromatography

Question 13

what is Boyle’s law?

Answer 13

the volume of a fixed mass of gas at a constant temperature is inversely proportional to the pressure upon it

Question 14

what is Gay Lussac’s law?

Answer 14

the pressure of a gas is directly proportional to its absolute temperature (measured in Kelvin) when the volume is held constant

P1/T1 = P2/T2

Question 15

examples of properties of gasses

Answer 15

• low density
• exert pressure
• compress easily
• fill any container
• diffuse (mix) quickly

Question 15

what is Charles’s law

Answer 15

the volume of a gas is directly proportional to its absolute temperature

V1/T1 = V2/T2

Question 16

retardation factor formula

Answer 16

Rf = distance sample went/max distance sample can move

Question 17

what is ionisation?

Answer 17

the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons

Question 18

what is dissociation?

Answer 18

a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into other things such as atoms, ions, or radicals

Question 19

acids + bases = ?

Answer 19

= salt and water

Question 20

acids + metals = ?

Answer 20

= salt and hydrogen gas

Question 21

acids + carbonates = ?

Answer 21

= CO2 + water + salt

Question 22

what’s the relationship between pH and hydrogen ion concentration?

Answer 22

as the pH increases, the hydrogen ion concentration decreases