Chapter 17, Problem 102QAP

Consider three metals, X, Y, and Z, and their salts, XA, YA, and ZA. Three experiments take place with the following results:
• $\text{X}+\text{hot}\to {\text{H}}_{\text{2}}\text{Obubbles}$
• $\text{X}+\text{YA}\to \text{no reaction}$
• $\text{X}+\text{ZA}\to \text{X discolored}+\text{Z}$
Rank metals X, Y, and Z, in order of decreasing strength as reducing agents.