Electrochemistry Nernst Equation

Technique used to convert one chemical parameter of a medium into an electrical parameter by an appropriate device, usually an electrode is called

• Electrophoresis

• Photometry

• Electochemistry

• Electrolysis

The potential difference, which is responsible for the flow of current from an electrode of higher potential to the electrode of lower potential is called

• electrode potential

• emf of cell

• charge potential

The electrodes are maintained in elec­trical continuity with the help of __________

• Salt bridge

• wires

• glass tube

• buffer solution

Tags

NGSS.HS-PS2-5

Nernst equation is used for

• finding out reduction or oxidation potential of single electrode

• determining the pH

• determining the acidity or alkalinity

• determining the concentration of reactants ad products

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NGSS.HS-PS1-4

An electroanalytical / electrochemical techniques uses ________

• working electrode

• reference electrode

• both reference and working electrodes

• working, reference and counter electrodes

Which among the following is an ion selective electrode?

• Calomel electrode

• oxygen electrode

• Glass electrode

• Hydrogen electrode

Nernst equation FOR (i) Mg(s) | Mg2+(0.001M) || Al3+(0.0001 M) | Al(s)

• E_CELL=E⁰_CELL-0.0591/6 log[Mg2+]³/[Al3+]²

• E_CELL=E⁰_CELL-0.0591/6 log[Al3+]²/[Mg2+]³

• E_CELL=E⁰_CELL+0.0591/3 log[Mg2+]³/[Al3+]²

• E_CELL=E⁰_CELL-0.0591/3 log[Mg2+] /[Al3+]

Tags

NGSS.HS-PS1-5

Given the standard reduction potentials, E^o of iron is -0.44V and E^o of oxygen is 1.23V.

what will be the emf of the cell?

• -0.79V

• -1.67V

• 1.67V

• 0.79V

Tags

NGSS.HS-PS3-1

At equilibrium

• Cell potential will be zero

• Equilibrium constant becomes equal to electrode potential

• Equilibrium constant becomes zero

• Cell potential becomes unity

For this electrochemical cell, what is the expected observation at cathode?

• Copper metal dissolves

• reddish brown solid deposited

• Silvery grey solid deposited

• Silver metal dissolves

Tags

NGSS.HS-PS2-5