(Solved): Experiment 3: What observations did you make when the zinc was added to the hydrochloric acid solu ...

Experiment 3: What observations did you make when the zinc was added to the hydrochloric acid solution? The \( \mathrm{pH} \) of the solution decreased. The final mass of the solution in the flask after they were combined was not the same as the combined mass of the hydrochloric acid and zinc. A precipitate (solid) formed. The color of the solution changed from colorless to green. Bubbles formed in the solution. The temperature of the solution increased.