Physical Chemistry

Question 1

Rate equation

Answer 1

Rate=k[A][B]

ONLY REACTANTS

Question 2

Units of rate

Answer 2

Moldm^-1s^-1

Question 3

Shapes from conc time graphs and orders

Answer 3

Zero-straight line -ve grad
First- downward curve decreasing grad
Second-steeper that first

Question 4

Identifying first

Answer 4

First order have continuous half life

Question 5

K from half life

Answer 5

K=ln2/half life

Question 6

Rate concentration graph shapes

Answer 6

0= horizontal line constant rate
1= straight line through origin
2=upward curve

Question 7

Finding k of a second order reactant

Answer 7

Plot rate against conc squared. K=gradient

Question 8

Rate determining step

Answer 8

Slowest step in a reaction

Question 9

Rate equation and rate determining step

Answer 9

Only include species in rds

Question 10

Arrhenius equation

Answer 10

K=A. e^(-Ea/RT)
A=frequency of successful 
collisions
Ea= activation energy
R=8.314
T=temp K

Question 11

Mole fraction

Answer 11

Number of moles of A/ total moles of gas in mixture

Question 12

Partial pressure

Answer 12

Mole fraction/total pressure

Question 13

Kp

Answer 13

Kc but with partial pressures

Question 14

What causes Kc to change?

Answer 14

Only temperature

Question 15

Bronsted lowry acids and bases

Answer 15

Acid=proton donor

Base=proton acceptor

Question 16

pH

Answer 16

-log[H+]

Question 17

[H+]

Answer 17

10^-pH

Question 18

Logarithmic scale of pH meter

Answer 18

pH of 1 has 10x conc of H+ that pH2

Question 19

Lattice enthalpy

Answer 19

The enthalpy Change that accompanies the formation of one mole of an ionic compound from its gassiest ions understand it conditions

Question 20

Enthalpy change of atomisation

Answer 20

The entropy change that takes place for the formation of one mole of gassiest atoms from the element in its standard state understand it conditions

Question 21

First electron affinity

Answer 21

The enthalpy change that takes place when one electron is added to each atom in one mole of gassiest atoms to form one mole of gassiest one minus ions

Question 22

Enthalpy change of solution

Answer 22

The enthalpy change that takes place when one mole of the solute dissolves in a solvent if the solvent is water the ions from the ionic lattice finish up surrounded with water molecules as aqueous ions

Question 23

Enthalpy change of hydration

Answer 23

The enthalpy change that accompanies the dissolving of gases ions in water to form one mole of aqueous ions

Question 24

Standard entropy

Answer 24

The entropy of one mole of substance under standard conditions

Question 25

Free energy change

Answer 25

DeltaG
Overall energy change in a reaction
Made of entropy and enthalpy

Question 26

Standard electrode potential

Answer 26

The tendency to be reduced and gain electrons

Question 27

Transition metal definition

Answer 27

D block elements that form at least one ion with the partially filled d orbital scandium and zinc are D block elements but they do not match this definition and are not classified as transition elements

Question 28

Properties of transition metals

Answer 28

Form compounds in which the transition element has different oxidation states form coloured compounds and the elements and compounds can act as a catalyst

Question 29

Precipitation reaction

Answer 29

When 2 aq solutions containing ions react to form an insoluble solid

Question 30

Nitriles made from

Answer 30

Haloalkane

Carbonyls