Which of the changes shown will increase the voltage of the cell : Co|Co2+(0.010M) || H+ (0.010 M)|H2(o.500 atm)|Pt increase the volume of CoCl2 solution from 100 mL to 300 mL Increase [H+] from 010 M to 0.500 M Increase the pressure of H2 from 500 atm to 1 atm Increase the mass of the Co electrode from 15g to 25 g Increase [Co2+] from 010 M to 0.500 M

The voltaic cell Cd(s)|Ca?t (ag) || Ni²+ (1.0 M)|Ni(s) has a cell potential of 0.310 V at 25°C. What is the concentration of cadmium ion? (Eell = 0.170 V.) %3D Concentration M

Write the overall reaction for the Redox reaction (below) when it occurs in a basic environment. H3ASO4 (aq) + Zn (s) → AsH3 (1) + Zn²+ (aq) Steps for writing half-cell reactions and overall Redox reactions: 1. Balance atoms other than H and O by changing their coefficients 2. Balance the O's and H's by adding OH and/or H₂O 3. Add electrons to balance the charge 4. Add the Oxidation and Reduction equations once the electrons in each cancel out 5. Cancel out (or reduce to the lowest possible numbers) any other species that are present on both sides of the reaction More Information H3ASO4 + AsH3 Zinc + Zinc ions

Enter your answer in the provided box. Calculate the emf of the following concentration cell: Mg(s) IMg2+(0.25 M) | Mg2+(0.78 M) |Mg(s)