Unit 3.1.1 Chemical equilibrium

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is constant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

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NGSS.HS-PS1-5

NGSS.HS-PS1-6

This symbol indicates that a reaction is ____________

• reversible
• irreversible

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NGSS.HS-PS1-6

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

• Chemical Equilibrium
• Chemical Balance
• Stoichiometry
• Chemical Reaction

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NGSS.HS-PS1-6

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.
• The concentrations of reactants and products do not change.
• The concentration of the reactants is equal to the concentration of the products.
• The forward and reverse reactions continue to occur.

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NGSS.HS-PS1-6

2A + 3B  <---->  2AB
The forward reaction forms the substance __________.

• A
• B
• AB
• A + B

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NGSS.HS-PS1-2

2A + 3B  <---->  2AB
The reverse reaction points towards the __________.

• left
• right
• up
• down

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NGSS.HS-PS1-6

2A + 3B  <---->  2AB
The reverse reaction forms the substance __________.

• A
• B
• AB
• A + B

Such reactions which continue in both directions are called:

• Irreversible reactions

• Reversible reactions

• Non-reactive reactions

• dynamic reactions

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NGSS.HS-PS1-6

A complete reaction is in which:

• All the reactants convert into products

• All the reactants do not convert into products

• Half reactants convert into products

• only 10% reactants convert into products

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NGSS.HS-PS1-7

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

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NGSS.HS-PS1-6