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Chemistry > C5 > Flashcards

C5 Flashcards

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1
Q

What is le chatelier’s principle

A

If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change to reestablish an equilibrium

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2
Q

What stresses effect le chatelier’s principle

A
  • tempurature
  • concertration
  • Pressure ( gases)
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3
Q

What happens when concertration increaces in an equilibrium

A

equilibrium shifts to the opposite side of of the reaction

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4
Q

What happens when concertration decreaces in an equilibrium

A

equilibrium shifts to the same side of of the reaction

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5
Q

What happens when pressure increaces in an equilibrium

A

equilibriam favours the side with fewer moles

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6
Q

What happens when pressure decreaces in an equilibrium

A

equilibriam favours the side with more moles

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7
Q

What units are used to messure concerntration

A

grams per dm^3
g/dm^3

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8
Q

What is dm^3 a unit of

A

volume

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9
Q

What is one decimeter?

A

1litre
1000cm^3

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10
Q

What is the equation for concentration

A

conc = mass/ volume

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11
Q

What is the equation for volume of gas

A

volume of gas = moles x24

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12
Q

What is the standard untis for volume of gas

A

dm^3

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13
Q

What gasses does the volume of gas equation work for

A

All gasses
(chlorine, steam, ….)

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14
Q

What conditions does this equation (volume of gas = moles x24) work under

A
  • Standard room tempurature
  • Standard room pressure
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15
Q

What does collision theory state

A

That in order for particle to react they must colide with each other with sufficent energy

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16
Q

What is activation energy

A

The minium amount of energy required for a reaction to take place

17
Q

What two things effect reaction rates

Refering to engery

A
  • The amount of energy that the particles have
  • Frequency of particle collisions
18
Q

What does increasing the temperature do to the reaction rate

A

It increases the reaction rate because :
- particles move faster so are more likely to react
- particles collide with more energy
This causes a Higher rate of successful collisions

19
Q

What 4 ways can you change the reaction rate

A

Change the:
- tempurature
- concerntration/pressure
- Catylist
- Surface area

20
Q

Why are Concentration and pressure considered one factor in reaction rates

A

They both refer to the amount of particles in a unit of volume

21
Q

What happens to reaction rates when you increase the Concentration/pressure

A
  • more particles per unit volume
  • more freaquent collisions
  • increased reaction rate
22
Q

What happens to reaction rates when you increase the surface area

A
  • Causes a higher surface area to volume ratio
  • increases the rate of collision
  • increases reaction rate
23
Q
A

Chemistry (6 decks)

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