Y9 Chem T1- Rates Of Reaction

Question 1

What does rate mean?

Answer 1

Rate means measurement in time

Question 2

Name a slow reaction

Answer 2

Rusting

Question 3

Name a fast reaction

Answer 3

The squeaky pop test

Question 4

What is between the core and the crust?

Answer 4

The mantle

Question 5

What does a catalyst do?

Answer 5

Speeds up the reaction

Question 6

Name a catalyst

Answer 6

Sodium

Question 7

What is the equation for rate (product)

Answer 7

Rate=amount of product formed / time

Question 8

What is the equation for rate (reactant)?

Answer 8

Amount of reactant used / time

Question 9

What does a gas syringe do?

Answer 9

Measures the volume of gas produced

Question 10

What does the balance do?

Answer 10

It measures the change in mass during the reaction

Question 11

What does the displacement of water measure?

Answer 11

The volume of a gas produced

Question 12

reactions speed up- temperature explain

Answer 12

temperature rises which makes the particles move faster, which means there are more collisions which means there are more chance of successful collisions

Question 13

reactions speed up- temperature explain

Answer 13

temperature rises which makes the particles move faster, which means there are more collisions which means there are more chance of successful collisions

Question 14

Concentration/pressure

Answer 14

More pressure in a unit means more particles per unit volume which means more collisions are frequent which increases the rate of reaction

Question 15

Surface area

Answer 15

If there is more surface area like on a powder, then it will be the best option because more of the surface would hit the acid

Question 16

Catalysts

Answer 16

They speed up the rate of reaction by providing a different pathway which requires less energy

Question 17

What is activation energy?

Answer 17

ithe minimum amount of energy that particles must have in order to react.

Question 18

What is a dependent variable?

Answer 18

What do you measure?

Question 19

What is an independent variable?

Answer 19

Something you change

Question 20

What is a control variable?

Answer 20

Things that stay the same

Question 21

What state of matter can be turned into a powder?

Answer 21

Solid

Question 22

What is concentration?

Answer 22

How many grams of solute are dissolved into 1dm3 of a solution?

Question 23

What does 1dm3 mean?

Answer 23

1dm3 - 1 decimetre cubed equals 100 cm³

Question 24

What is the equation for concentration?

Answer 24

Concentration (grams/dm3) = mass(g) / volume(dm3

Question 25

If there is a great concentration…

Answer 25

There is a greater number of collisions per second unit volume

Question 26

Why and how do we measure the mass of a reaction mixture?

Answer 26

why? because we can then see how much gas has left the mixture
how? by measuring the gal on a scale

Question 27

what are we doing when a gas syringe is put into a conical flask with a reaction mixture in it?

Answer 27

The gas syringe is collecting all the gas and then we measure the volume

Question 28

What is a biological catalyst

Answer 28

enzymes

Question 29

name 4 factors that affect the rate of a chemical reaction

Answer 29

Concentration n pressure,catalyst,surface area,temperature

Question 30

The rate of a chemical reaction will be increase if….

Answer 30

there are more frequent successful collisions between reactant particles

Question 31

how do you lower the activation energy?

Answer 31

using a catalyst