Grade 8 8.3 Surface area and rate of reaction

Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• pressure

• catalyst

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

As the frequency of ______________ increases, the rate of reaction increases.

• Time

• Reactions

• Collisions

• Reactants

When a solid lump is cut into pieces, its total surface area ... .

(a)  

... in the total surface area gives ... in the rate of reaction

(a)  

What is the surface area of this figure?

• 200 cm ²
• 800 cm ²
• 400 cm ²
• 100 cm ²

Tags

CCSS.7.G.B.6

^{_{Find the Surface Area}}

• 15m²
• 16m²
• 18m²
• 20m²

Tags

CCSS.7.G.B.6

P, Q, R and S are pieces of apparatus.

Which row describes the correct apparatus for the measurement made?

• A

• B

• C

• D

In an experiment, a 2 g lump of zinc and 2 g of powdered zinc are added separately to equal volumes of dilute sulphuric acid. The solid line on the graph shows the volume of gas given off when the 2 g lump is used. Which dotted line is obtained when the zinc is powdered? 

• A
• B
• C
• D