Reaction Rates

Question 1

Rate of reaction=

Answer 1

Amount of reactant used or amount of product formed
—————————————
Time

Question 2

What does rate of reaction help show?

Answer 2

How quickly a reaction happens

Question 3

What are three examples of how rate of reaction can be measured?

Answer 3

Precipitation
Change in mass
The volume of gas given off

Question 4

Steps in precipitation

Answer 4

1– mix two reactant solutions on a marked piece of paper

2– measure how long it takes for the mark to disappear

Question 5

What is a downside to the precipitation technique?

Answer 5

Different people may not agree on exactly when the mark disappears

Question 6

What is the reaction of magnesium metal with dilute HCL good for?

Answer 6

It is good for measuring the effects of changing the concentration on reaction rate

Question 7

Gradient=

Answer 7

Change in y / Change in x

Question 8

How do you work out the rate of a curved graph?

Answer 8

Draw a tangent at the point you want and work out the gradient