electrochemistry Flashcards
1
Q
Discuss two advantages and two disadvantages of using hydrogen fuel cells for energy rather than using fossil fuels
A
- only product is water
- greater efficiency
- hydrogen difficult to store
- hydrogen difficult to manufacture initially
2
Q
Define the term standard electrode potential
A
- potential difference of electrochemical cell comprising a half cell combined with a standard hydrogen electrode
- 1atm, 1moldm-3 , 298k
3
Q
Give one use of chromium metal and state the property of chromium that makes it suitable for this use
A
stainless steel
-corrosion resistant
4
Q
explain flow of electrons in cell
A
electrons flow towards half cell with more positive standard electrode potential