C6 Equilibrium

C6 Equilibrium

To the left! .... or is it to the right?

Equilibrium can never make up it's mind....

Open Ended

What do you think the word equilibrium might mean?

Hint: Does it sound like any other words you know?

Multiple Choice

What does this arrow mean?

• Reaction is reversible

• Reaction is irreversible

• Reaction has stopped

Multiple Choice

Frying an egg is a chemical reaction (you see a colour change and make something new!).

Do you think this is a reversible or irreversible reaction?

• Irreversible (cannot go back to how it was)

• Reversible (you can un-fry and egg)

Fill in the Blank

What is the name given to the substance made in a chemical reaction (right hand side of the equation)?

Multiple Choice

In the reaction:

Ammonium chloride ⇌ ammonia + hydrogen chloride

Which describes the forward reaction?

• ammonium chloride being broken down into ammonia and hydrogen chloride.

• Ammonia and hydrogen chloride bonding together to form ammonium chloride.

Multiple Choice

In the reaction:
Ammonium chloride ⇌ ammonia + hydrogen chloride

Which describes the backward (or reverse) reaction?

• ammonium chloride being broken down into ammonia and hydrogen chloride.

• Ammonia and hydrogen chloride bonding together to form ammonium chloride.

Multiple Choice

True or False

A closed system allows products or reactants to escape into the surroundings?

• TRUE

• FALSE

Multiple Choice

You mix two liquids together in a conicle flask and it starts to bubble. Would this reaction reach equilibrium?

Think about whether reactants and products are able to escape.

• Yes, it can reach equilibrium

• No, it will not be able to reach equilibrium

Multiple Select

Select the TWO boxes which are correct about how we measure rate.

• Amount of reactant used up over time

• Amount of product used up over time

• Amount of reactant made over time

• Amount of product made over time

Fill in the Blank

Equilibrium is when the rate of the forward and backward reaction (in a reversible reaction) is ..........................

Multiple Choice

When a reaction is in equilibrium the forward and backward reaction have a same rate of reaction.

• TRUE

• FALSE

Multiple Choice

When equilibrium shifts to the RIGHT are you making more products or reactants?

A + B ⇌ C + D

Think about which side of the arrow reactants and products are on.

• Reactants

• Products

Multiple Choice

When equilibrium shifts to the LEFT are you making more products or reactants?

A + B ⇌ C + D

Think about which side of the arrow reactants and products are on.

• Reactants

• Products

Multiple Choice

Ammonium chloride ⇌ ammonia + hydrogen chloride

The reaction above is an endothermic reaction (in the forward direction).

What will happen to equilibrium if you heated up the reactants?

• Shift to the Right (makes more products)

• Shifts to the left (makes more reactants)

Open Ended

Why does increasing pressure only work with gases and not liquids and solids?

Think about how you would draw the particles in solids, liquids and gases.

Multiple Choice

Ammonium chloride ⇌ ammonia + hydrogen chloride

What will happen to equilibrium in the equation above if you increase the concentration of hydrogen chloride?

• Shift to the Right (makes more products)

• Shifts to the left (makes more reactants)

Multiple Choice

Ammonium chloride ⇌ ammonia + hydrogen chloride

What will happen to equilibrium in the equation above if you increase the concentration of ammonium chloride?

• Shift to the Right (makes more products)

• Shifts to the left (makes more reactants)

Multiple Choice

Ammonium chloride ⇌ ammonia + hydrogen chloride

What will happen to equilibrium in the equation above if you increase the concentration of ammonia?

• Shift to the Right (makes more products)

• Shifts to the left (makes more reactants)