Question

A student wants to make a fair comparison of the reactivity of the metals with
hydrochloric acid.
0 1 . 2 Name two variables that must be kept constant.

Answer 1

Answer:

H2SO4 you are hydro chloric gas you

Answer 2

Answer:

Any two among mass, surface area, concentration, volume or temperature.

Explanation:

When comparing the reactivity of metals with a certain acid, a lot of factors play into it.

• The mass of the metal (weight can be allowed) must be kept constant.
• The surface area of the metal (ignoring the size and length) must be kept constant.
• The concentration of HCl must be kept constant for comparison.
• The temperature of HCl (ignoring the room temperature) must be kept constant for comparison.

Hence any two of the factors mentioned above can be chosen for your answer.