Equilibria

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

What are two conditions for a reversible reaction in a closed system to be in equilibrium?

Back (Answer)

• rate of forward reaction = rate of reverse reaction • concentrations of products and reactants no longer changing

Front (Question)

State the symbol equation for the production of ammonia in the Haber process. Include state symbols.

Back (Answer)

N2 (g) + 3H2 (g) <-> 2NH3 (g)

Front (Question)

What are the typical conditions in the Haber process?

Back (Answer)

• 450 degrees C • 200 atm (or 20 000 kPa) • iron catalyst

Front (Question)

State the symbol equation for the conversion of sulfur dioxide to sulfur trioxide in the Contact process. Include state symbols.

Back (Answer)

2SO2 (g) + O2 (g) <-> 2SO3 (g)

Front (Question)

What is the following equation? N2 (g) + 3H2 (g) <-> 2NH3

Back (Answer)

production of ammonia in Haber process

Front (Question)

What is the following equation? 2SO2 (g) + O2 (g) <-> 2SO3 (g)

Back (Answer)

conversion of sulfur dioxide to sulfur trioxide in the Contact process

Front (Question)

What are the typical conditions in the Contact process, to convert sulfur dioxide into sulfur trioxide?

Back (Answer)

• 450 degrees C • 2 atm • vanadium pentoxide catalyst

Front (Question)

What is the source of hydrogen in the Haber process?

Back (Answer)

methane

Front (Question)

What is the source of nitrogen in the Haber process?

Back (Answer)

air

#10

Front (Question)

What is the source of sulfur dioxide in the Contact process?

Back (Answer)

burning sulfur or roasting sulfide ores

#11

Front (Question)

What is the source of oxygen in the Contact process?

Back (Answer)

air

#12

Front (Question)

What are some substances used as fertilisers?

Back (Answer)

-ammonium salts and nitrates -nitrogen -phosphorus -potassium

#13

Front (Question)

What can ammonium salts be used for?

Back (Answer)

fertiliser

#14

Front (Question)

What can nitrates be used for?

Back (Answer)

fertiliser

#15

Front (Question)

What do NPK fertilisers do?

Back (Answer)

provide nitrogen, phosphorus and potassium for improved plant growth

#16

Front (Question)

what happens when hydrated cobalt(II) chloride is heated

Back (Answer)

it loses its water of crystallisation and turns into anhydrous cobalt(II) chloride

#17

Front (Question)

what happens when anhydrous blue cobalt(II) chloride crystals are added to water

Back (Answer)

turns pink

#18

Front (Question)

what happens when anhydrous copper(II) sulphate is added to water

Back (Answer)

turns blue

#19

Front (Question)

what happens when you increase concentration in a reversible reaction?

Back (Answer)

favor forward reaction

#20

Front (Question)

what happens when you decrease concentration in a reversible reaction?

Back (Answer)

favor reverse reaction

#21

Front (Question)

what happens when you increase temperature in a reversible reaction?

Back (Answer)

favor the endothermic reaction

#22

Front (Question)

what happens when you decrease temperature in a reversible reaction?

Back (Answer)

favor exothermic reaction

#23

Front (Question)

what happens when you increase pressure in a reversible reaction?

Back (Answer)

favor side with less moles

#24

Front (Question)

what happens when you decrease pressure in a reversible reaction?

Back (Answer)

favor side with more moles