CHemistry

• Molarity (m) = mol/L
• Cathode

  Electrode at which reduction takes place
• Anode


  Electrode at which oxidation takes place
• Reduction

  Electronegation, which is electron gain
• Oxidation


  Delectation or loss of electron
• In a galvanic cell

  Electrons generated due to oxidation flow through an external wire from anode to cathode
• In a galvanic cell


  At the cathode, electrons are consumed due to reduction
• In a galvanic cell

  Anode is given a negative sign as negatively charged electrons flow away from it
• In an electrolytic cell

  External DC source transfers electrons from anode to cathode
• In an electrolytic cell

  Anode becomes positively charged and cathode becomes negatively charged
• Summary of differences

  For a galvanic cell: cathode is positive, anode is negative. For an electrolytic cell: cathode is negative, anode is positive
• Remember cathode reduction oxidation anode as "red cat and ox"
• Diagram shows cat at cathode position and ox at anode position
• Cathode

  Electrode at which reduction takes place
• Anode


  Electrode at which oxidation takes place
• Reduction

  Electronegation, which is electron gain
• Oxidation


  Delectation or loss of electron
• Galvanic cell

  For cathode, it is positive; for anode, it is negative
• Electrolytic cell

  For cathode, it is negative; for anode, it is positive
• In a galvanic cell

  Electrons generated due to oxidation flow from anode to cathode through an external wire
• In a galvanic cell

  At the cathode, electrons are consumed due to reduction, hence the anode is given a negative sign
• In an electrolytic cell

  External DC source transfers electrons from anode to cathode, making the anode positively charged and the cathode negatively charged
• In an electrolytic cell

  For the anode, it is positive; for the cathode, it is negative
• Speaker: 'Thank you'