Question 1
A solution of MnO42– is electrolytically reduced to Mn3+. A current of 5.29 amp is passed through the solution for 15.0 minutes. What is the number of moles of Mn3+ produced in this process? (1 faraday = 96,485 coulombs)
◦
0.0493 mol◦
0.148 mol◦
2.74 × 10–4 mol
◦
0.0164 mol◦
1.10 × 10–3 mol
Question 2
A strip of copper is placed in a 1 M solution of copper nitrate and a strip of silver is placed in a 1 M solution of silver nitrate. The two metal strips are connected to a voltmeter by wires and a salt bridge connects the solutions. The following standard reduction potentials apply:
| Ag +( aq) + e – Ag( s) | E° = +0.80 V |
| Cu 2+( aq) + 2e – Cu( s) | E° = +0.34 V |
Which of the following statements is false?
◦
Electrons flow in the external circuit from the copper electrode to the silver electrode.◦
The silver electrode increases in mass as the cell operates.◦
There is a net general movement of silver ions through the salt bridge to the copper half-cell.◦
Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell.◦
Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell.
Solution (Polynomial Long Division)
Disposable, single use thermometer strip
Are the resutls from the glucose strip test consistent with the results obtained from the ...
Which outcome corresponds to the combination of silver and carbonate ions shown in the ...
What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply
![What is the pH of an aqueous solution if the [H+] = 0.000 000 075 M?](https://biology-forums.com/gallery/43/medium_6_11_12_21_7_23_55.jpeg)
What is the pH of an aqueous solution if the [H+] = 0.000 000 075 M?