Question

1. How many grams of chromium metal will be deposited from a solution that contains Cr^3+ ions if a current of 1.01 A is applied for 40.2 minutes. Answer in______________ grams?

2. How many grams of cobalt metal will be deposited from a solution that contains Co^2+ ions if a current of 0.517 A is applied for 40.5 minutes. Answer in_____________ grams?

3. How many grams of cobalt metal will be deposited from a solution that contains Co^2+ ions if a current of 0.719 A is applied for 30.5 minutes. Answer in_____________ grams?

4. How many amperes are required to deposit 0.163 grams of manganese metal in 462 seconds, from a solution that contains Mn^2+ ions. Answer in ________________A?

5. How many seconds are required to deposit 0.291 grams of iron metal from a solution that contains Fe^2+ ions, if a current of 0.518 A is applied. Answer in ________________s?

6. How many seconds are required to deposit 0.236 grams of iron metal from a solution that contains Fe^2+ions, if a current of 0.719 A is applied. Answer in ________________s?

7. Write the cell notation for an electrochemical cell consisting of an anode where Cr (s) is oxidized to Cr3+ (aq) and a cathode where H+ (aq)is reduced to H2 (g) at a platinum electrode . Assume all aqueous solutions have a concentration of 1 mol/L and gases have a pressure of 1 bar.

_____________________

8. Write the cell notation for an electrochemical cell consisting of an anode where Co (s) is oxidized to Co2+ (aq) and a cathode where Pb2+(aq) is reduced to Pb (s) . Assume all aqueous solutions have a concentration of 1 mol/L. _______________________,

9. Write the cell notation for an electrochemical cell consisting of an anode where Zn (s) is oxidized to Zn2+ (aq) and a cathode where Co2+(aq) is reduced to Co (s) . Assume all aqueous solutions have a concentration of 1 mol/L. __________________,

Answer 1

O cowombe - ampene x Se c 21.0/A + 2 mih X 60lec min -2436.12 ( er (4) ths meane thou for enery 3 mole of electrone tafered I moe of c metal ie plaked. 529/mg mo lar ms 01 CY : May of cr me tal - +50/mal 2436.12 c\ imole 96500 C 3 mole mals of Cr met al : 0. am bene x Sec 0.517A +(40.5 min X6 0bec 1256.31 C Co cloumbe - this meahs that for enery 2 mol of ele dron I mele of cr me fay is plated 58.93 glmat trang tewd MolCIr maly of Co 2 man of Co balt: 58.98g/mot 1956.21CX Imale 96500 C mass of lo2 0.36g(0