6.6 The Electrochemical Series

Electrochemical series
■ Electrochemical series

	►	A series of elements arrangement according to the order of decreasing tendency to release electrons.
	►	Element located at higher position in the electrochemical series: ○ More electropositive ○ Has a greater tendency to form cations by donating electrons ○ More reactive

■ Electrochemical series can be constructed based on:

	►	The potential difference between two metals in the voltaic cell. ○ Metals that further apart in the electrochemical series produce a higher voltage that metals which are close to each other.
	►	The displacement of metals by another more reactive metals from its salt solution. ○ The metal which is more electropositive will displace the less electropositive metal from its salt solution. ○ Example: Displacement of copper, Cu, from copper(II) nitrate solution by zinc. ○ Chemical equation: ZN(s) + CU(NO3)2(aq) → Zn(NO3)2(aq) + Cu(s) ○ Nitrate ion, NO-3 does not take part in the chemical reaction ○ Thus, ionic equation can be written as:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)

	Laboratory Activity 6.6.1: Constructing the electrochemical series based on the potential difference between two metals
	Laboratory Activity 6.6.2: To construct the electrochemical series based on the displacement of metals

■ This video contains information on the electrochemical series.

← 6.5 Voltaic Cell

Video Playlist →

⇲ For exercise(objective and subjective), download for free on Android OS.