5. Which metal produced the most hydrogen based on moles of metal used? 6. Write

Question

5. Which metal produced the most hydrogen based on moles of metal used?

6. Write balanced equations for each reaction (equation editior). Based on the coefficients, which metal is expected to produce more hydrogen per mole of metal? Is this observation consistent with graphs?

7. If Mg and Zn have the same ratio of mole of metal/mole of hydrogen, as indicated in balanced equations, then why is Zn’s trend line in graph lower than Mg?

8. Based on experimental results and current values of metal, is Mg or Al a reasonable alternative to Zn when producing H2? Current price for Zn is $3.70/100g, for Mg $3.70/100 g and Al $ 1.80/100 g. Support your answer.

Explanation / Answer

5) Mg

6) Mg + 2HCl MgCl + H

7) Because the moleular weight of Zn is higher than the molecular weight of Mg

8 ) Mg is the best alternative to produce H2 in respect to Zn

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