Question

experimental data a student mixed four white colored solids into separate containers of water. each of them dissolved completely and was clear and colorless. the student then mixed the solutions together two at a time, according to the experimental grid below. each of the solutions remained clear or transparent and they did not have access to a thermometer. there was a fizzing noise and bubbling associated with the combination of f & h. experimental grid (before and after mixing solutions: e, f, g, h) what is the indication of reaction the student observed according to the experimental data? - formation of gas; - color change; - formation of a precipitate; - temperature change

Explanation:

The problem states that when mixing F and H, there was a hissing noise and bubbling. Bubbling is a sign of gas formation. Color - change is not observed as solutions remained colorless. Precipitate formation would be a solid, but here bubbling (gas) is seen. Temperature change can't be measured as no thermometer, and the hissing/bubbling points to gas.

Answer:

formation of a gas