Question

For questions 17-18, balance the following redox in acidic solution. Mn$^{2+}$(aq) + BiO$_3$(aq) $\rightarrow$ MnO$_4^-$(aq) + Bi$^{3+}$ 17. Which of the following is the correct balanced half reaction for BiO$_3$ $\rightarrow$ Bi$^{3+}$? a. 6H$^+$ + 4e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O b. 3H$^+$ + 2e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O c. 2H$^+$ + 5e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + H$_2$O d. 6H$^+$ + 2e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O e. none of the above 18. What number of electrons would appear in this partially balanced half reaction 4 H$_2$O + Mn$^{2+}$ $\rightarrow$ MnO$_4^-$ + + ? a. 1e$^-$, 8H$^+$ b. 2e$^-$, 4H$^+$ c. 3e$^-$, 4H$^+$ d. 5e$^-$, 8H$^+$ e. none of the above

          For questions 17-18, balance the following redox in acidic solution.
Mn$^{2+}$(aq) + BiO$_3$(aq) $\rightarrow$ MnO$_4^-$(aq) + Bi$^{3+}$
17. Which of the following is the correct balanced half reaction for BiO$_3$ $\rightarrow$ Bi$^{3+}$?
a. 6H$^+$ + 4e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O
b. 3H$^+$ + 2e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O
c. 2H$^+$ + 5e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + H$_2$O
d. 6H$^+$ + 2e$^-$ + BiO$_3^-$ $\rightarrow$ Bi$^{3+}$ + 3H$_2$O
e. none of the above
18. What number of electrons would appear in this partially balanced half reaction 4 H$_2$O
+ Mn$^{2+}$ $\rightarrow$ MnO$_4^-$ + ____ + ____ ?
a. 1e$^-$, 8H$^+$ b. 2e$^-$, 4H$^+$ c. 3e$^-$, 4H$^+$ d. 5e$^-$, 8H$^+$ e. none of the above

For questions 17-18, balance the following redox in acidic solution.
Mn^2+(aq) + BiO3(aq) → MnO4^-(aq) + Bi^3+
17. Which of the following is the correct balanced half reaction for BiO3 → Bi^3+?
a. 6H^+ + 4e^- + BiO3^- → Bi^3+ + 3H2O
b. 3H^+ + 2e^- + BiO3^- → Bi^3+ + 3H2O
c. 2H^+ + 5e^- + BiO3^- → Bi^3+ + H2O
d. 6H^+ + 2e^- + BiO3^- → Bi^3+ + 3H2O
e. none of the above
18. What number of electrons would appear in this partially balanced half reaction 4 H2O
+ Mn^2+ → MnO4^- + + ?
a. 1e^-, 8H^+ b. 2e^-, 4H^+ c. 3e^-, 4H^+ d. 5e^-, 8H^+ e. none of the above

Added by Richard P.

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