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Calculate the ΔG0f at 298 K for the PbCI2(s) from the following information. ΔG0 for the reactions below is -58.4 kJ at 298 K.
PbS(s) + 2HCI(g) > PbCI2(s) + H2S(g)
ΔG0f (kJ/mol) 97.82 149.0 0 -228.6
Calculate the Standard Gibbs free energy change for the following reaction at 25 degree celcius.
CaCO3 + 2HCI(g) > CaCI2(s) + CO2(g) + H2O(I)
ΔG0f (kJ/mol) 1129 -95.3 -750.2 -394.4 -237.2
Solve the following problems.
1. A voltaic cell is based on a Co2+ /Co half-cell and an AgCl/Ag half-cell.
a. What reaction occurs at the anode?
b. What is the standard cell potential?
2. Using the standard reduction potentials, calculate the standard emf for each of the following reactions:
a. 2Al3+ + 3Cd ⟶ 2Al + 3Cd2+
b. Cr + 2Cr3+⟶3Cr2+
c. H2 + I2 ⟶ 2H+ + 2I
Determine if each of the following redox reactions is spontaneous or not.
1. Cu + 2Ag+ ⟶ Cu2+ + 2Ag
2. Al3+ + Fe ⟶ Al + Fe2+
3. Zn + Ni2+ ⟶ Zn2+ + Ni
4. 3Pb + 2Au3+ ⟶ 3Pb2+ + 2Au
5. Hg + Pb2+⟶ Hg2+ + Pb
Determine if each of the following redox reactions is spontaneous or not.
1. Cu + 2Ag+ ⟶ Cu2+ + 2Ag
2. Al3+ + Fe ⟶ Al + Fe2+
3. Zn + Ni2+ ⟶ Zn2+ + Ni
4. 3Pb + 2Au3+ ⟶ 3Pb2+ + 2Au
5. Hg + Pb2+⟶ Hg2+ + Pb
9 defective electric toothbrushes were accidentally shipped to a drugstore by Cleanbrush Products along with 29 nondefective ones.
What is the probability the first two electric toothbrushes sold will not be defective?
Considering the IQ results, the school administrator is also planning to offer additional math courses to the top 20%. What should be the IQ score of the student to be qualified to take the additional math course?
AH-453 kJ/mol-rxn P4010(S) + 6H₂O(1)-4H3PO4(aq) How many grams of P4010(S) would have to react to produce 167 kJ of energy?
a solution of 2z3+16i=0
The metals in Group IIIA, IVA and VA of the periodic table are not transition metals. However, all but 1 have variable charges. What element in Group IIIA, Period 3 has a fixed charge, and what is that charge?
#339914 on Dec 2023