Rate of Reaction (Unit 1)

10cm³ of gas was collected over 5 minutes. What was the average rate of reaction?

• 0.5 cm³ min^-1
• 2 cm³ min^-1
• 2 cm³/s^-1
• 2 cm³/min^-1

Adding a catalyst will not increase the rate of reaction...

• True
• False

In a reaction, the mass lost in 20 seconds was 5 grams. What is the average rate of reaction over this time?

• 4
• \frac{5}{20}
• \frac{20}{5}
• \frac{1}{20}

Increasing surface area and decreasing particle size have the same effect on rate of reaction...

• True
• False

10 grams of a manganese catalyst was added to increase the rate of a reaction. What mass of catalyst will be recovered?

• 5 g
• 15 g
• 0 g
• 10 g

Increasing concentration of a reactant will increase the rate of reaction?

• True
• False

In a reaction the mass lost in 30 s was 3 g. What is the average rate in g s^-1?

• 0.1
• 1
• 10
• 30

A reaction had a rate of 0.1 g s^-1 and a mass loss of 3 g. How long did it take for the mass loss to occur?

• 0.3 s
• 0.1 s
• 30 s
• 3 s

10g of sodium reacts with water for 10 seconds before being removed. 5g of sodium is recovered. What is Δq = ?

• 10 g
• - 5g
• -10 g
• 5 g

average rate =

• average time
• \frac{Δt}{Δq}
• \frac{Δq}{Δt}
• average quantity