What is the Keq expression for this reaction? 2 NO (g) + O 2(g) ⇌ 2 NO 2(g)

Keq = [NO 2 ] 2 / [NO] 2 [O 2 ]

Keq = [NO] 2 [O 2 ] / [NO 2 ] 2

Keq = [NO 2 ] 2 / [NO] 2 + [O 2 ]

An equilibrium constant with a large value, e.g. Keq = 1.1x10 12 , indicates…

Mostly reactants at equilibrium

What is the equilibrium expression for: Fe 3 O 4 ( s ) + 4H 2 (g) <=> 3Fe( s ) + 4H 2 O(g) K c =

[Fe] 3 [H 2 O] 4 / [Fe 3 O 4 ] [H 2 ] 4

[Fe 3 O 4 ] [H 2 ] 4 / [Fe] 3 [H 2 O] 4

[Fe] [H 2 O] / [Fe 3 O 4 ] [H 2 ]

For the reaction... H 2 (g) + Cl 2 (g) <=> 2HCl (g) + heat If the pressure in the system is increased , the equilibrium position will _______.

not shift position at all as 2 mol gas <=> 2 mol gas

For the reaction... N 2 (g) + 3 H 2 (g) <=> 2 NH 3 (g) If the pressure in the system is increased , which substance(s) will increase in concentration?

NH 3 (as 4 mol gas → 2 mol gas)

N 2 (as 2 mol gas → 4 mol gas)

H 2 (as 2 mol gas → 4 mol gas)

N 2 and H 2 (as 2 mol gas → 4 mol gas)

At elevated temperatures ammonium carbonate, NH 2 COONH 4 , is in equilibrium with NH 3 and CO 2 according to the equation; NH 2 COONH 4 ( s ) ↔ 2 NH 3 ( g ) + CO 2 ( g ) What is the equilibrium expression for this reaction?

K = 2 [NH 3 ][CO 2 ] [NH 2 COONH 4 ]

K = [NH 3 ] 2 [CO 2 ] [NH 2 COONH 4 ]

How do catalysts increase the rate of reaction?

the activation energy is lowered

The frequency of collisions is the increased

the energy of collisions is increased

Both the frequency and energy of collisions is increased

Consider the following equilibrium: 2NO (g) + O 2(g) <-> 2NO 2 (g) + energy When the volume of the container is increased, the equilibrium shifts to the

left and K eq remains constant.

right and K eq remains constant.

The value of K eq changes when

the concentration of reactants changes.

Which of the following shows the correct dissolution reaction for BaCl 2 ?

BaCl 2 (s) -> Ba 2+ (aq) + 2Cl - (aq)

Ba 2+ (aq) + Cl 2 - (aq) -> BaCl 2 (s)

BaCl 2 (aq) -> Ba 2+ (aq) + 2Cl - (aq)

Ba 2+ (aq) + 2Cl - (aq) -> BaCl 2 (s)

The K sp expression for a saturated solution of Ca 3 (PO 4 ) 2 is

K sp = [3Ca 2+ ] 3 [2PO 4 3- ] 2

Which of the following compounds has the lowest molar solubility in mol/L in water at 25°C?

Ag 3 PO 4 K sp = 1.8 x 10 –18

Equilibrium

Authored by Rebecca Athmer

Chemistry

12th Grade

NGSS covered

Used 3+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify the incorrect statement about achieving equilibrium.

achieved when product and reactant concentrations are equal

achieved when forward and reverse reaction rates are same

achieved when concentration of reactants is stable/constant

achieved when concentration ratio of reactants to products becomes stable, thus fixing the equilibrium constant (equilibrium position)

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This symbol indicates that a reaction is ____________

reversible

irreversible

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

MULTIPLE CHOICE QUESTION

1 min • 1 pt

At what time the reaction reached equilibrium?

t₁

t₂

t₃

t₄

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify the labels (a) and (b) on the graph.

a is concentration of reactants and b is the concentration of product

a is concentration of product and b is the concentration of reactant

a is the volume of reactants and b is the volume of product

a the mass of reactants and b is the mass of product

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

At what time (in seconds) is equilibrium established?

0 seconds

1 second

5 seconds

10 seconds

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

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Equilibrium

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

Identify the incorrect statement about achieving equilibrium.

This symbol indicates that a reaction is ____________

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

At what time the reaction reached equilibrium?

Identify the labels (a) and (b) on the graph.

At what time (in seconds) is equilibrium established?

Which of the two graphs reaches equilibrium?

For the reaction...
SO₂ + O₂ <=> SO₃
If the concentration of SO₂is increased, the equilibrium position of the reaction will shift ___________.

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

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Popular Resources on Wayground

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Equilibrium

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

Identify the incorrect statement about achieving equilibrium.

This symbol indicates that a reaction is ____________

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

At what time the reaction reached equilibrium?

Identify the labels (a) and (b) on the graph.

At what time (in seconds) is equilibrium established?

Which of the two graphs reaches equilibrium?

For the reaction...SO2 + O2 <=> SO3If the concentration of SO2 is increased, the equilibrium position of the reaction will shift ___________.

For the reaction...N2 + O2 <=> 2NOIf O2 is removed, the concentration of N2 will _______.

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Popular Resources on Wayground

Discover more resources for Chemistry

For the reaction...
SO₂ + O₂ <=> SO₃
If the concentration of SO₂is increased, the equilibrium position of the reaction will shift ___________.

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