A voltaic cell designed to measure [Cu2+] is constructed of a standard hydrogen electrode and a copper metal electrode in the Cu2+ solution of interest. If you want to construct a calibration curve for how the cell potential varies with the concentration of copper(II), what do you plot in order to obtain a straight line? What is the slope of the line?
Electrochemistry Redox reaction- Many biological processes ↳Reduction and Oxidation- Movement of electron from one species to another + A → A Oxidation: Loss of election A reduced B, A is the reducing Reduction: Gain of electron agent. B oxidized A B → B- Oxidation Is Loss Reduction Is Gain--OILRIG to remember + 2+ Zn(s) +2 H (aq)→Zn (aq) + H (g) 2 Zinc loses e Hydrogen gained e Oxidized. Reducing agent Reduced, Oxidizing agent H + F →2HF Molecular 2 2 ↳Need oxidation numbers. Oxidation numbers/states- Not the actual charge, Hypothetical Rules -Atoms in elemental form= oxidation number is 0 -Solid metals number is 0 -Any monatomic ion the number= the charge -Nonmetals usually have negative oxidation numbers -Oxygen is usually -2 except with H O and with F 2 2 -Hydrogen is -1 with metals and +1 with nonmetals -Fluorine is -1 -neutral compounds oxidation levels add up to 0 Half Reduction Method -Balance for different ions separately, combine at end. Keep # of e lost equal to gained -Steps must be followed Cu S(s) + NO (aq)→Cu (aq) + SO (aq)+NO(g)2- 3 4 ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
