Questions from General Chemistry

Q: For each of the following oxidation–reduction reactions, identify which

For each of the following oxidation–reduction reactions, identify which element is oxidized and which is reduced. a. 6Na(s) + N2( g) 2Na3N(s) b. Mg(s) + Cl2( g) MgCl2(s)...

Q: Why must the number of electrons lost in the oxidation equal the

Why must the number of electrons lost in the oxidation equal the number of electrons gained in the reduction? Is it possible to have “leftover” electrons in a reaction?

Q: Balance each of the following half-reactions. a.

Balance each of the following half-reactions. a. Cu / Cu2+ b. Fe3+ / Fe2+ c. Br– / Br2 d. Fe2+ / Fe

Q: Balance each of the following half-reactions. a.

Balance each of the following half-reactions. a. 3N2( g) + 2e- 2N3-(aq) b. O22-(aq) O2( g) c. Zn(s) Zn2+(aq) d. F2( g) F-(aq)

Q: Balance each of the following half-reactions, which take place

Balance each of the following half-reactions, which take place in acidic solution. a. HClO(aq) Cl-(aq) b. NO(aq) N2O( g) c. N2O(aq) N2( g) d. ClO3-(aq...

Q: Balance each of the following half-reactions, which take place

Balance each of the following half-reactions, which take place in acidic solution. a. O2(g) / H2O(l) b. SO42–(aq) / H2SO3(aq) c. H2O2(aq) / H2O(l) d. NO2–(aq) / NO3–(aq)

Q: Balance each of the following oxidation–reduction reactions, which take

Balance each of the following oxidation–reduction reactions, which take place in acidic solution, by using the “half-reaction” method. a. Mg(s) + Hg2+(aq) / Mg2+(aq) + Hg22+(aq) b. NO3–(aq) + Br–(aq)...

Q: Balance each of the following oxidation–reduction reactions, which take

Balance each of the following oxidation–reduction reactions, which take place in acidic solution, by using the “half-reaction” method. a. Al(s) + H+(aq) / Al3+(aq) + H2(g) b. S2–(aq) + NO3–(g) / S(s...

Q: Iodide ion, I-, is one of the most easily oxidized

Iodide ion, I-, is one of the most easily oxidized species. Balance each of the following oxidation–reduction reactions, which take place in acidic solution, by using the “half-reaction” method. a. I...

Q: The element krypton has several radioactive isotopes. Below are listed several

The element krypton has several radioactive isotopes. Below are listed several of these isotopes along with their half-lives. Which of the isotopes is most stable? Which of the isotopes is “hottest”?...