This question is about hydrochloric acid.
Dilute hydrochloric acid, HCl(aq)\text{HCl}(\text{aq})HCl(aq), reacts with many metals.
A student investigates the reactivity of four metals, W, X, Y, and Z, by adding a small, equal-sized sample of each metal to separate test tubes containing the same volume and concentration of dilute hydrochloric acid.
The student's observations are recorded in the table below:
| Metal | Observations |
|---|---|
| W | Moderate, steady bubbling; the metal slowly gets smaller |
| X | No bubbles produced and no visible change |
| Y | Violent effervescence; the metal disappears extremely rapidly with a large temperature rise |
| Z | Very few bubbles produced extremely slowly on the surface of the metal |
Use the observations in the table to place the four metals in order of reactivity. Place the most reactive metal first.
Give 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.
