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Chemistry S3: Unit 1 Chemical changes and Structure > Key Area 1: Rates of Reaction > Flashcards

Key Area 1: Rates of Reaction Flashcards

1
Q

What type of reactions are explosions?

A

Fast

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2
Q

What type of reactions is rusting?

A

Slow

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3
Q

What are four factors that affect rate?

A

Increased Concentration (solution)
Increased Temperature
Decreased Particle size (solid)
Catalysts

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4
Q

What is a solute?

A

The solid being dissolved

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5
Q

What is a solvent?

A

The liquid that dissolves

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6
Q

What is a solution?

A

When a solute dissolves in a solvent

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7
Q

More particles in the same place means?

A

More collisions

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8
Q

More collisions means?

A

More effective collisions

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9
Q

Rate of reactions definition

A

The rate of a chemical reaction is a measure of how fast the reactants are being used up and how fast products are being made (speed at which CR takes place)

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10
Q

Average rate?

A

Change in quantity of reactant over time. Slows as reactant is used up.

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11
Q

Graphs, gradient?

A

Gradient at the start shows the rate

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12
Q

Graphs, end point?

A

Flat line at the end is the total volume of gas

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13
Q

How do you calculate the average rate?

A

Change in volume
over
Change in time

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14
Q

How do you write the units for average rate?

A

Cm cubed/ s
or
Cm cubed -1S

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15
Q

What is a catalyst?

A

A substance that speeds up a chemical reaction

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16
Q

Catalyst at the end of reaction, summary

A

Speeds up reaction
Chemically unchanged at the end
Mass stays the same

17
Q

Reactants over time?

A

Go down, decrease

18
Q

Products overtime?

A

Go up, increase

19
Q

How do chemical reactions happen?

A

When the particles and reactants come together

20
Q

What is temperature the measure of?

A

Kinetic energy

21
Q

Temp, Turns?

A

Heat into kinetic energy

22
Q

Temp, When they get hotter?

A

Move faster

23
Q

Using what particles increase reaction rate?

A

Smaller

24
Q

Increase what cause more collisions at surface?

A

Surface area

25
Q

Examples of catalysts

A

Nickel, used for margarine from veg oil

Platinum used in car exhausts

26
Q

Test for Oxygen

A

Relights a glowing splint

27
Q

What do you measure to follow the progress of chemical reactions?

A

Changes in mass, volume and other quantitys can be measured

28
Q

Graphs can be interpreted in terms of?

A

End-point of a reaction
quantity of product
quantity of reactant used
effect of changing conditions

29
Q

The rate of a reaction can be shown to decrease over time by?

A

Calculating the average rate at different stages of the reaction.

Chemistry S3: Unit 1 Chemical changes and Structure (4 decks)

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