Reactivity Series - Data, Graph & Calculation Cards

Question 1

What is the independent variable when comparing metal reactivity?

Answer 1

The type of metal.

This variable is manipulated to observe its effect on the dependent variable.

Question 2

What is the dependent variable when comparing metal reactivity?

Answer 2

The rate or volume of hydrogen gas produced.

This variable is measured to assess the effect of the independent variable.

Question 3

Name two control variables in a metal + acid experiment.

Answer 3

• Acid concentration
• Temperature

These variables must be kept constant to ensure a fair test.

Question 4

How can accuracy be improved in a gas-collection experiment?

Answer 4

• Use a gas syringe
• Repeat results
• Calculate a mean

These methods help to minimize errors and increase reliability.

Question 5

What safety precaution is needed when reacting metals with acids?

Answer 5

Wear goggles and avoid using very reactive metals.

This is essential to protect against splashes and potential hazards.