6 The Rate and Extent of Chemical Change

Question 1

Rate of reaction equation

Answer 1

amount of reactant used 𝗼𝗿 product formed
__________________________________
time

Question 2

How can you find the rate of reaction?

Answer 2

• By measuring the amount of reactants used
• Measuring the amount of products formed
• Measuring the time it takes for a reaction mixture to become opaque or change colour

Question 3

𝗴𝗿𝗮𝗽𝗵 𝗼𝗻 𝗽𝗿𝗼𝗴𝗿𝗲𝘀𝘀 𝗼𝗳 𝗮 𝗰𝗵𝗲𝗺𝗶𝗰𝗮𝗹 𝗿𝗲𝗮𝗰𝘁𝗶𝗼𝗻

What are key things to remember?

Answer 3

• The steeper the line the faster the reaction
• When a reaction stops the lines becomes horizontal (one of the reactants have been used up)
• Same amount of product is formed from the same amount of reactants, regardless of rate

Question 4

Catalyst

Answer 4

A substance that increases the rate of a chemical reaction without being used up in the process.

Question 5

Reversible reaction

Answer 5

Products can react to produce the original reactants:
A(g) + B(g) ⇌ C(g) + D(g)
So, C and D can react to produce A and B and vice versa.

Question 6

In a ______ ______, no _________ are added and no products are _______.

Answer 6

1) closed system
2) reactants
3) removed

Question 7

When a reversible reaction occurs in a closed system, an ___________ is achieved when the rate of the _______ reaction is _____ to the rate of the _______ reaction.

Answer 7

1) equilibrium
2) forward
3) equal
4) backward