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SC12 - Reversible Reactions and Equilibria ✓

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Total cards: 11•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (11)

#1
Front (Question)

SC12a - What is a reversible reaction?

Back (Answer)

A reaction where the products can react again to reform the reactants

#2
Front (Question)

SC12a - What symbol would show that a reaction is reversible?

Back (Answer)

⇌ : The double arrow

#3
Front (Question)

SC12a - In a reversible reaction how does the speed of the forward reaction and backward reaction change over time?

Back (Answer)

• The forward reaction starts fast and gets slower over time. • The backward reaction starts slow and gets faster over time.

#4
Front (Question)

SC12a - Define Dynamic Equilibrium

Back (Answer)

This is when the forward and backward reactions are occuring at the same rate, therefore the percentage of products and reactants remain the same

#5
Front (Question)

SC12a - What happens to the amount of products and reactants produced once a reaction has reached Dynamic Equilibrium?

Back (Answer)

They stop changing (increasing or decreasing)

#6
Front (Question)

SC12a - What is required for Dynamic Equilibrium to be achieved, and why?

Back (Answer)

• A closed system. • In an open system fluids can escape and equilibrium cannot be reached

#7
Front (Question)

SC12a - What is the name and the chemical formula of the process that creates ammonia?

Back (Answer)

• The Haber Process: • N2(g) + 3H2(g) ⇌ 2NH3(g)

#8
Front (Question)

SC12a - What is the temperature, pressure and catalyst used during the Harber Process?

Back (Answer)

• T: 450° • P: 200 Atmospheres (atm) • C: Iron Catalyst

#9
Front (Question)

SC12a - What happens to the position of equilibrium if you increase/decrease temperature?

Back (Answer)

• Increase - shifts in the endothermic direction • Decrease - shifts in the exothermic direction

#10
Front (Question)

SC12a - What happens to the position of equilibrium when you decrease/increase gas pressure?

Back (Answer)

Increase - shifts in the direction that formers fewer molecules (to reduce pressure) Decrease - shifts in the direction the forms more gas molecules (to increase pressure)

#11
Front (Question)

SC12a - What happens to the position of equilibrium when you decrease/increase a concentration?

Back (Answer)

• Increase - shifts in the direction that uses up the substance added • Decrease - shifts in the direction that forms more of the substance that was removed