Surface area and rate

Question 1

An increase in surface area of the reactant

Answer 1

increases rate of reaction

Question 2

Larger surface area ->

Answer 2

more reactant surfaces -> more frequent collision -> more product formed per second -> rate of reaction increases

Question 3

What has the largest surface area 2 g of small marble chips or 2 g of large marble chips

Answer 3

2 g of small marble chips

Question 4

Which would react the fastest with acid: 5 g of zinc lumps, 5 g of powdered zinc or 5 g of granular zinc, why

Answer 4

Powdered zinc – as it has the largest surface area

Question 5

Why do reactants with large surface area have a higher rate of reaction, compared to reactants with lower surface area

Answer 5

There are more surfaces so there are more frequent collisions

Question 6

Describe the graph shape of large surface area and small surface area

Answer 6

large surface area - steep incline, levels out
small surface area - shallower incline, levels out at same amount