Question

While investigating the chemical and physical properties of metallic element E, a student conducts an experiment by combining E(s) and HBr(aq), which react according to the following equation:
2E(s) + 2HBr(aq)----> 2EBr(aq)+H2(g)
a)write the net-ionic equation for the reaction.
b)in the reaction, is E(s) being oxidized or reduced? Justify your answer in terms of oxidation numbers.

Answer 1

Answer: 2H+ (aq) + E(s) = E2+ (aq) + H2(g); Oxidized

Explanation:

B:

E lose 2 electrons, the oxdization number of E increased.