In order to calculate the force between two charges using Coulomb\'s Law, if the

Question

In order to calculate the force between two charges using Coulomb's Law, if the measurement is not being done in a vacuum, one rtutt add: a) the Faraday constant b) the electrode potential of the medium c) the dtolectrx constant of the med-um d) the Defeye-Huckel A constant 2. In the table of standard electrode potentials, the element which is assigned an oxidation potential of zero is: a) oxygen b) hydrogen c) sodium d) fluorine 3. The Nernst Equation is used to calculate electrode potentials at nonstandard. A) temperatures b) pressures c) concentrations d) all of these 4. Which solution would behave the most ideally? A) 0.01M NaCI b) 0.01M CaCI_2 c) 0.01M AICI_3 d) 0.01M AI_2(SO_4)_3 5. Calculated values of mean ionic molality using the Debye-Huckel limiting law are only accurate for: a) dilute solutions b) those hagving low charge c) those having high charge d) those made in nonaqueous solvents

Explanation / Answer

1. The dielectric constant of the medium is used in Coulomb's law to take into account that the measurment is not in vacuum. Therefore, the correct answer is c).

2. A hydrogen is assigned with zero RedOx potential, therefore b) is the correct answer.

3. The Nernst equation includes temperature, pressure and concentration, therefore, d) is the correct answer.

4. The most ideal solution has the lowest concentration of ions, so it has to be an 1-1 electrolyte. NaCl is the only one 1-1 electrolyte, therefore, a) is the correct answer.

5. The Debye-Huckel approximation can be applied to a diluted solutions only. Therefore, the correct answer is a).

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