R2.2 (The rate of chemical change)

Question 1

Reaction rate

Answer 1

speed at which reactents turn into products

Question 2

Relevance of reaction rate

Answer 2

• Industrial processes (want to know how to produce more & faster)

Question 3

Ways in which rate of reaction can be measured

Answer 3

• prodcut produced over time
• reactent used over time

Question 4

why reactions stop

Answer 4

1. concentration of reactents decreases
2. decreases frequency of collisions
3. reaction slows down

Question 5

calculating instantaneous rate of change (derivative)

Answer 5

1. draw a tangent to the point on the curve
2. construct a right angled triangle with the tangent as te hypothenuse (as large as possible)
3. calculate gradient of tangent (Δy/Δx)

Question 6

reaction rate formula

Answer 6

Δ quantity/ Δ time