Electrochemistry

Oxygen

Nitrogen

Hydrogen

Chlorine

It uses more fuel

It converts chemical energy directly into electrical energy

It works at very low temperatures

It does not use electrodes

Only Anode

Only Cathode

Both Anode and Cathode depending on the other half-cell

Neither Anode nor Cathode

Cathode to Anode

Anode to Cathode

Salt bridge to Anode

Anode to Salt bridge

One Ampere

One Faraday

One Joule

One Watt

Atomic mass

Oxidation number

Reduction potentials

Electronegativity

Linear quotient

Natural logarithm of the reaction quotient

Logarithm base 10 of the reaction quotient

Negative log of the concentration

$E_{cell}$

$E^\circ$

$Q$

$\Delta G$

It stays constant until it drops to zero suddenly

It increases gradually

It decreases gradually as reactants are consumed

It depends only on the temperature

Specific conductance

Molar conductance

Both A and B

Neither A nor B

$S cm^2 mol^{-1} (mol L^{-1})^{-1/2}$

$S cm^2 mol^{-1}$

$S cm^{-1}$

No units

Increases

Decreases

Remains constant

Decreases then increases

$\Lambda_m^o = \frac{1000 \times \kappa}{S}$

$\Lambda_m^o = S \times \kappa$

$\Lambda_m^o = \frac{\kappa}{S}$

$S = \frac{\kappa}{\Lambda_m^o}$

$NaCl$

$KNO_3$

$CH_3COOH$

$CuSO_4$

$\lambda_{Mg^{2+}}^o + \lambda_{NO_3^-}^o$

$2\lambda_{Mg^{2+}}^o + \lambda_{NO_3^-}^o$

$\lambda_{Mg^{2+}}^o + 2\lambda_{NO_3^-}^o$

$2\lambda_{Mg^{2+}}^o + 2\lambda_{NO_3^-}^o$

Darkens

Fades

Remains unchanged

Turns yellow

$6.023 \times 10^{23} \text{ electrons}$

$1 \text{ electron}$

$100 \text{ electrons}$

$6.023 \times 10^{22} \text{ electrons}$

Reduction

Oxidation

Ionization

Neutralization

Can only be used once.

Is always the second choice for power.

Can be restored to its original chemical state by passing electricity.

Produces a secondary voltage of $1.5\ V$.

Zinc

Ammonium chloride

Manganese dioxide

Zinc chloride

The zinc container gets thicker.

The build-up of reaction products near the electrodes.

The carbon rod melts.

The electrolyte turns into a solid.

Produces greenhouse gases like $CH_4$

Produces only harmless water vapor

Produces toxic carbon monoxide

Produces acidic rain components

The Cathode

The Anode

The Electrolyte

The External wire

It is immediately discarded as waste

It is condensed and used as a source of drinking water

It is used to dissolve the electrodes

It is converted into solid ice for cooling

Anode

Cathode

Electrolyte

Insulator

Iron

Aluminum

Silver

Zinc

Phosphoric acid and metal phosphates

Sulfuric acid

Nitric acid

Sodium hydroxide