electrochemistry

Question 1

Discuss two advantages and two disadvantages of using hydrogen fuel cells for energy rather than using fossil fuels

Answer 1

• only product is water
• greater efficiency
• hydrogen difficult to store
• hydrogen difficult to manufacture initially

Question 2

Define the term standard electrode potential

Answer 2

• potential difference of electrochemical cell comprising a half cell combined with a standard hydrogen electrode
• 1atm, 1moldm-3 , 298k

Question 3

Give one use of chromium metal and state the property of chromium that makes it suitable for this use

Answer 3

stainless steel

-corrosion resistant

Question 4

explain flow of electrons in cell

Answer 4

electrons flow towards half cell with more positive standard electrode potential