SOLVED

20.2 Algorithmic Questions 1) Identify oxidation. A) increase in oxidation number B) loss of electrons C) gain of electrons D) loss of protons E) both A and B 2) What element is being oxidized in the following redox reaction? Ni2+(aq) + NH4+(aq) → Ni(s) + NO3?(aq) A) Ni B) N C) H D) O 3) How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Ba(s) + Cr3+(aq) → Cr(s) + Ba2+(aq) A) 6 B) 2 C) 3 D) 1 E) 4 4) How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg2+(aq) + Li(s) → Mg(s) + Li+(aq) A) 1 B) 2 C) 3 D) 4 E) 6 5) Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of Sn and H+ in the balanced reaction? Sn2+(aq) + NH4+(aq) → Sn(s) + NO3?(aq) A) Sn = 1, H? = 8 B) Sn = 1, H? = 4 C) Sn = 4, H? = 10 D) Sn = 2, H? = 4 E) Sn = 3, H? = 5 6) Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of Ni and Ag+ in the balanced reaction? Ni(s) + Ag+(aq) → Ag(s) + Ni2+(aq) A) Ni = 1, Ag? = 2 B) Ni = 1, Ag? = 1 C) Ni = 2, Ag? = 1 D) Ni = 2, Ag? = 2 E) Ni = 3, Ag? = 1 7) Balance the following redox reaction if it occurs in basic solution. What are the coefficients in front of Al and Br2 in the balanced reaction? Al(s) + Br2(g)→ Al3+(aq) + Br-(aq) A) Al = 2, Br2 = 3 B) Al = 2, Br2 = 6 C) Al = 1, Br2 = 1 D) Al = 2, Br2 = 1 E) Al = 3, Br2 = 2 8) Determine the redox reaction represented by the following cell notation. Mn(s) ? Mn2+(aq) Cu2+(aq) ? Cu(s) A) Cu(s) + Mn2+(aq) → Mn(s) + Cu2+(aq) B) Mn(s) + Cu2+(aq) → Cu(s) + Mn2+(aq) C) 2 Mn(s) + Cu2+(aq) → Cu(s) + 2 Mn2+(aq) D) 2 Cu(s) + Mn2+(aq) → Mn(s) + 2 Cu2+(aq) E) 3 Mn(s) + 2 Cu2+(aq) → 2 Cu(s) + 3 Mn2+(aq) 9) Determine the cell notation for the redox reaction given below. Pb(s) + 2 Ag?(aq) → Pb2+(aq) + 2 Ag(s) A) Ag+(aq) ? Ag(s) Pb(s) ? Pb2+(aq) B) Ag(s) ? Ag+(aq) Pb2+(aq) ? Pb(s) C) Pb(s) ? Pb2+(aq) Ag+(aq) ? Ag(s) D) Pb2+(aq) ? Pb(s) Ag(s) ? Ag+(aq) E) Pb(s) ? Ag(s) Pb2+(aq) ? Ag+(aq) 10) Determine the cell notation for the redox reaction given below. Sn(s) + 2 H?(aq) → Sn2+(aq) + H2(g) A) H+(aq) ? H2(g) ? Pt Sn(s) ? Sn2+(aq) B) H2(g) ? H+(aq) ? Pt Sn2+(aq) ? Sn(s) C) Sn2+(aq) ? Sn(s) H2(g) ? H+(aq) ? Pt D) Sn(s) ? Sn2+(aq) H+(aq) ? H2(g) ? Pt E