Concentration Cells and Electrochemistry Quiz

A concentration cell generates electrical energy due to:

• Difference in pressure

• Difference in electrode material

• Difference in temperature

• Difference in ion concentration

Types of concentration cells include:

• Gas and solid cells

• Fuel and storage cells

• Galvanic and electrolytic cells

• Electrolyte and electrode concentration cells

A concentration cell without transference means:

• Ions migrate at different rates

• No salt bridge is used

• Transport number is zero

• No migration of ions

Liquid Junction Potential (LJP) arises due to:

• Temperature differences

• Redox reactions

• Presence of a catalyst

• Difference in mobility of ions at the junction

LJP can be minimized by using:

• Pure water as an electrolyte

• Electrodes with different potentials

• Non-conducting materials

• Salt bridge with equal ion mobility

A practical application of concentration cells is:

• Electroplating

• Battery storage

• Water purification

• pH measurement

The transport number of an ion represents:

• The total concentration of ions

• The charge of the ion

• The resistance of the ion

• The fraction of current carried by the ion

The sum of the transport numbers of cations and anions in a solution is always:

• 0

• 2

• 10

• 1

An ion with a higher transport number has:

• Lower conductivity

• No charge

• Higher resistance

• Higher mobility

Solubility product (Ksp) applies to:

• Weak acids

• Strong bases

• Electrolytes

• Sparingly soluble salts