LeChatelier's Principle

What does stoichiometry of a chemical equation show?

• Mole ratios in relation to products

• The mole ratios of reactants needed relative to products formed

• The mole ratios of products needed relative to reactants formed

• Mole raios in relation to reactants

What does stoichiometry NOT show?

(CHECK ALL THAT APPLY)

• How fast the reaction occurs

• If all the reactants will be used up to form products

• The species of each compound being used

• Non of these

If only reactions are initially present, will the initial reaction rate be high or low?

• High

• Low

At equilibrium, what will be present in the reaction vessel?

• Neither reactants or products

• Some of the products

• Some of each of the reactants and products

• Some of the reactants

What does Le Chatelier's Principle state?

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What will the reaction response do when Le Chat's is applied?

• Restore equilibrium

• Favor reactants

• Favor products

• None of these

Possible perturbations (or disturbance) to equilibrium include ________?

(CHOOSE ALL THAT APPLY)

• Changing the concentrations of one or more chemicals.

• Changing the volume or pressure in a container in which gases are among the reactants or products

• Changing temperatures

• None of these

In an exothermic reaction, what does heat do?

• Brings back to equilibrium

• Produces

• Releases

• Starts equilibrium

What do good visual reactions of Le Chat's involve?

• Consistency

• Color

• Organic dyes used as indicator

• Synthetic dyes used as an indicator

What is the purpose of this lab?

(CHECK ALL THAT APPLY)

Hint: Choose them all.

• To observe color changes among complexes

• To see cool color changes

• To understand LeChat's Principle

• To be cooler than you were before learning LeChat's Principle