Snapquiz - Rate of Reaction

Question 1. 120g of magnesium is added to a 0.5 molar solution of sulphuric acid. After 15 minutes it is still reacting and it has produced 60cm³ of hydrogen gas. What is its rate of reaction?

0.5cm³ per gram.
2g per cm³.
4cm³ per minute.
8g per minute.

Question 2. A reaction between a 1.0 molar hydrochloric acid solution and some 15% pure copper carbonate ore takes 12 minutes to form 4.8g of copper chloride. What is its rate of reaction?

0.32g per percent.
0.067 moles per percent.
25% per minute.
0.4g per minute.

Question 3. When calculating the rate of change in chemistry, which variable could you be observing change?

Time taken.
Amount of reactant used up.
Amount of fizzing.
Colour.

Question 4. Which is the lowest rate of reaction?

20g per minute.
1.08kg per hour.
1000g per hour
0.3g per second.

Question 5. Why is a high rate of reaction usually more desirable to industrial chemists?

Producing more product in a given time is usually purer.
Producing more product in a given time is usually cheaper.
Producing more product in a given time is usually safer.
Producing more product in a given time is usually easier.

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