Question

Consider the chemical reaction below. Upper Z n (s) plus 2 upper H superscript plus (a q) right arrow upper Z n superscript 2 plus (a q) upper H subscript 2 (g). Which half reaction correctly represents reduction for this equation? Upper Z n (s) right arrow upper Z n superscript 2 plus (a q) plus 2 e superscript minus. 2 upper H superscript plus (a q) plus 2 e superscript minus right arrow upper H subscript 2 (g). Upper Z n (s) right arrow 2 upper Z n superscript 2 plus (a q) plus e superscript minus. 2 upper H plus (a q) plus e superscript minus right arrow upper H subscript 2 (g).

Answer 1

The reduction half-reaction where hydrogen ions are reduced is represented by 2 H+(aq) + 2 e− → H2(g), which balances both hydrogen atoms and electrical charge.

Step-by-step explanation:

The reduction half-reaction for the chemical equation Zn(s) + 2 H+(aq) → Zn2+(aq) + H2(g) can be correctly represented by the equation 2 H+(aq) + 2 e− → H2(g). In this half-reaction, hydrogen ions (H+) gain electrons and are thus reduced to form hydrogen gas (H2).

It is important to balance the atoms and the electrical charge in a half-reaction. This reduction half-reaction has a balance in the number of hydrogen atoms and shows the two electrons as reactants, which serve to neutralize the 2+ charge on the hydrogen ions. The overall charge on both sides is zero, which is a requirement for a properly balanced half-reaction.

Answer 2

The answer is A

Step-by-step explanation: