Snapquiz - Rate of Reaction

This is the Snapquiz on Rate of Reaction. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. 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 easier.
Producing more product in a given time is usually safer.
Producing more product in a given time is usually cheaper.


Question 2. When calculating the rate of change in chemistry, which variable could you be observing change?

Odour.
Time taken.
Temperature of solution.
Amount of product formed.


Question 3. 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?

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


Question 4. 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?

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


Question 5. 256g of zinc carbonate is added to a 0.1 molar solution of nitric acid. After 8 minutes it is still reacting and it has produced 12cm3 of carbon dioxide gas. What is its rate of reaction?

1.5cm3 per minute.
21.33g per cm3.
32g per minute.
120cm3 per mole.


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