This question is about hydrochloric acid.
Dilute hydrochloric acid, HCl(aq)\text{HCl}(\text{aq})HCl(aq), reacts with many metals.
An investigator monitors the reaction of dilute hydrochloric acid with four metal samples, W, X, Y, and Z, using equal masses and surface areas in each trial.
The table below details the observations recorded:
| Metal | Observations |
|---|---|
| W | No bubble formation or temperature change |
| X | Vigorous effervescence with rapid gas production |
| Y | Very slow stream of bubbles observed over several minutes |
| Z | Steady, moderate release of gas bubbles |
Use the observations to list the four metals in decreasing order of reactivity (most reactive first).
State the names of the two products formed when magnesium reacts with dilute hydrochloric acid.
Describe a chemical test to show that dilute hydrochloric acid contains chloride ions.
