Electrochemistry

What are the features of a standard hydrogen electrode?

• I and II
• I and III
• II and III
• I, II and III

Calculate the cell potential of voltaic cell

• –1.51
• - 0.03
• +0.03
• +1.51

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-5

Calculate the cell potential of voltaic cell

• –1.60 V
• +1.60 V
• –3.12 V
• +3.12 V

Tags

NGSS.HS-PS3-1

Which represents reduction process occurring in standard hydrogen electrode?

• H_2(g) → 2H⁺_(aq) + 2e^–
• H⁺_(aq) + OH^–_(aq) → H₂O_(l)
• 2H⁺_(aq) + 2e^– → H_2(g)
• O_2(g) + 4H⁺_(aq) + 4e– → 2H₂O_(l)

Which statement is correct about value of E^ο?

• more positive value E^ο, greater driving force for reduction
• more negative value E^ο, greater driving force for reduction
• more positive value E^ο, greater the rate of reaction
• more negative value E^ο, greater the rate of reaction

Tags

NGSS.HS-PS2-5

What is the equation and cell potential?

• 2Al³⁺ + 3Ni → 2Al + 3Ni²⁺ E^O = 1.89 V
• 2Al + 3Ni²⁺ → 2Al³⁺ + 3Ni E^O = 1.89 V
• 2Al³⁺ + 3Ni → 2Al + 3Ni²⁺ E^O = 1.43 V
• 2Al + 3Ni²⁺ → 2Al³⁺ + 3Ni E^O = 1.43 V

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

What happen when zinc is added to magnesium chloride?

• No reaction will take place
• Chlorine gas will be produced
• Magnesium metal will form
• Zinc chloride will form

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement is correct?

• Ca²⁺ can oxidize Ni
• Ni²⁺ can reduce Ca²⁺
• Fe³⁺ can oxidize Ni
• Fe³⁺ can reduce Ca²⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In a Galvanic Cell, the anode is...

• positive

• negative

In a Galvanic cell, the electrons flow from the...

• anode to the cathode

• cathode to the anode

Tags

NGSS.HS-PS2-5