Equillibrium

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

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
• Chemical Constant
• Chemical Reaction

Tags

NGSS.HS-PS1-6

A chemical reaction where the reactants form products that, in turn, react together to give the reactants back.

• reversible reaction

• irreversible reaction

• decomposition reaction

• synthesis

Tags

NGSS.HS-PS1-6

Define chemical equilibrium.

• A reaction is reversible.
• The concentration of the reactants is equal to the concentration of the products.
• The rate of a forward reaction is equal to the rate of the reverse reaction.
• The reaction stops and no further change in concentration occurs.

Tags

NGSS.HS-PS1-6

During equilibrium, the rates of the forward and the reverse reaction are ________

• the same 
• unequal
• unequal for exothermic reactions
• unequal for endothermic reactions

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

If a reaction is reversible and has reached equilibrium, what can be said about the amounts of reactants and products?

• some reactant, some product
• no reactant, all product
• all reactant, no product

Tags

NGSS.HS-PS1-6

For the reaction...
SO₂ + O₂  <=>  SO₃
If the concentration of SO₂ is increased, the equilibrium position of the reaction will shift ___________.

• to the left
• to the right
• to the left and right 
• neither left nor right

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

For the reaction...
SO₂ + O₂ <=>  SO₃
If the equilibrium position shifts to the right, the concentration of O₂ will ___________.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-6

For the reaction...
N₂  +  O₂  <=>  2NO
If  O₂ is removed, the  concentration of N₂ will _______.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

For the reaction...

N_{2 (g)} + 3 H_2(g) <=> 2 NH_{3 (g)}

If the volume is decreased, which substance(s) will increase in concentration?

• N₂ (as 2 mol gas → 4 mol gas)

• H₂ (as 2 mol gas → 4 mol gas)

• N₂ and H₂ (as 2 mol gas → 4 mol gas)

• NH₃ (as 4 mol gas → 2 mol gas)

Tags

NGSS.HS-PS1-6