QCAA Chemistry Unit 3&4 v2

Primary, Secondary or Tertiary

Chemists

Calculations

forward <-->reverse

What class of compound is this?

100

octan-3-ol

secondary

100

602214076000000000000000 of something is named after this man

Avogadro

100

The Voltage produced by a Ag⁺|Ag||Ni|Ni²⁺ galvanic cell

1.04V

100

Who theorised that if a change is made to a system at equilibrium, the system will move to partially oppose this change.

Le Chatelier

100

glucose

monosaccharide

200

2-methylpropan-2-ol

tertiary

200

The chemist who has a law named after him involving the relationship between pressure & volume of a gas.

Boyle

200

For the system :

2NO₂ (g) <-> N₂O₄(g)

At equilibrium [NO₂] = 2mol/L & [N₂O₄] = 10mol/L

What is K_c?

Kc = 2.5

200

For the Haber process

N_{2 (g)}+ 3H_{2 (g)} <--> 2NH_{3 (g)}

Will increasing the pressure of the system move the equilibrium forward or reverse?

forward

200

but-2-yne

alkyne (unsaturated hydrocarbon)

300

N-ethylbutan-1-amine

secondary

300

Bronsted & Lowry both improved upon this chemist's model of acids & bases.

Arhennius

300

What is the pH of a 0.4M solution of nitric acid?

pH = 0.4

300

For the Contact process Step 2

2SO_{2 (g)}+ O_{2 (g)} <--> 2SO_{3 (g)}

is the forward reaction favoured at higher or lower pressures

Higher

300

Gly-Arg-Lys

tripeptide

400

1-methylcyclohexanol

tertiary

400

Element 96 is named after this Chemist

Marie Curie

400

If the K_a of propanoic acid

is 1.34 x 10^-5,

What is the pK_b of the propanoate ion?

pK_b = 9.1

400

For the Haber process

N_{2 (g)}+ 3H_{2 (g)} <--> 2NH_{3 (g)}

What change will adding more nitrogen to the system have on K_c ?

no change

400

cellulose

polysaccharide

500

2-methylbutan-2-amine

primary

500

A chemist who early in their career calculated trigonal distortions in Nickel complexes; then later developed a method for determining the level of oxidation in oil using IR spectroscopy.

Mr Wilson

500

In a titration, it takes 17.23mL of a 0.245M solution of NaOH to neutralise 20mL of citric acid. What is the concentration of the citric acid solution?

Conc = 0.07M

500

lowering the temperature of an endothermic reaction will:

a) increase the rate & increase the yield

b) increase the rate & decrease the yield

c) decrease the rate & increase the yield

d) decrease the rate & decrease the yield

500

nylon

condensation polymer