Question

A student obtains two strips of magnesium, Mg, ribbon that are each 3 cm long. One strip of magnesium is placed in a test tube containing 5 mL of water, and the other strip is placed in a test tube containing 5 mL of hydrochloric acid, HCl. Both liquids are at room temperature. The student’s observations are recorded in the table.

Which statement is NOT supported by the student's observations?

Question 5 options:

A chemical reaction takes place between magnesium and hydrochloric acid.

A gas is released in Test Tube 2.

The substances in both test tubes are reactive only at high temperatures.

Energy is released in the reaction involving hydrochloric acid.

Answer 1

C)The substances in both test tubes are reactive only at high temperatures.

Step-by-step explanation:

I did the test.

Answer 2

The substances in both test tubes are reactive only at high temperatures.

Step-by-step explanation:

Bubbling occurs in test tube 2, which is a sign of a chemical change. Hope this helps.