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equilibrium reading guide quiz

Authored by Katherine Odom

Chemistry

10th - 12th Grade

Used 1+ times

equilibrium reading guide quiz
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When the system X + 2 Y <=> Z has reached equilibrium, which of the following is TRUE?

Forward reaction and Backward reaction stop.
Forward reaction has sped up and backward reaction has slowed down.
Forward and backward reactions occur at the same rate.
Forward reaction has slowed down and backward reaction has sped up.

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the Kc expression for this reaction?
   2 NO(g)  +  O2(g) ⇌  2 NO2(g)

K= [NO2]2 / [NO][O2]
K=  [NO][O2] / [NO2]2
K= [NO][O2] [NO2]2
K= [NO2]2 / [NO]2 +  [O2]

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An equilibrium constant with a large value, e.g. Kc = 1000, indicates…

A very fast reaction
Mostly products at equilibrium
Mostly reactants at equilibrium
Nothing useful at all

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Le Chatelier's Principle states that.... 
If a (dynamic) equilibrium is disturbed by changing the conditions, the position of equilibrium................

moves to increase the change
moves to counteract the change
does not change

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Changes in pressure will only affect substances that are in the __________ state.

gaseous
liquid
solid

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What are [A] and [B]?

concentration of reactants
concentration of products
energy of reactants
energy of products

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an exothermic reaction energy is transferred from

reactants to their surroundings
the surroundings to reactants
one reactant to another
the container to the chemicals

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