Question

rank Ca, Cu, Fe, Mg, Sn, and Zn in terms of increasing reactivity. rank most (if not all) of the metals by simply comparing the reactions that occurred when each metal was added to HCl Clearly, those metals that reacted with HCl to produce hydrogen gas would be considered more active that those that exhibited no reaction. In addition, the metal that reacted the most vigorously in acid would be the most reactive metal. By continuing this line of reasoning you should be able to generate at least a preliminary activity series for the metals under study. Data collected in the metal displacement tests can be used to corroborate your findings and/or aid you in determining the correct ranking (or at least the one supported by your experimental data). In this case, the metal that exhibited no reaction when added to all of the different metal solutions would be considered the least active metal. Conversely, the metal that displaced all of the metals in solution would be considered the most active metal. You should be able to articulate in detail how you arrived at your final prediction regarding the relative reactivities of these metals. In other words, you must understand how your group came up with your metal activity series. ( NEED TO EXPLAIN WHAT IN THE BOLD, SO SMALL SUMMARY EXPLAINING)

Answer 1

Q1.

reactivity goes as follows:

Ca2+ + 2 e− ⇌ Ca(s) −2.868

Cu2+ + 2 e− ⇌ Cu(s) +0.337

Fe3+ + 3 e− ⇌ Fe(s) −0.04

Mg2+ + 2 e− ⇌ Mg(s) −2.372

Sn2+ + 2 e− ⇌ Sn(s) −0.13

Zn2+ + 2 e− ⇌ Zn(s) −0.7618

therefore, the most negative is the most reactive...

Ca2+ + 2 e− ⇌ Ca(s) −2.868

Mg2+ + 2 e− ⇌ Mg(s) −2.372

Zn2+ + 2 e− ⇌ Zn(s) −0.7618

Sn2+ + 2 e− ⇌ Sn(s) −0.13

Fe3+ + 3 e− ⇌ Fe(s) −0.04

Cu2+ + 2 e− ⇌ Cu(s) +0.337

Metals that will react with HCl to form H2:

Ca2+ + 2 e− ⇌ Ca(s) −2.868

Mg2+ + 2 e− ⇌ Mg(s) −2.372

Q2

The prediction is based directly on potentials for reduction, so we hav ea numerical standard to know which is more reactive than the other one