QUOTE(lawlietpy @ Oct 28 2013, 08:53 PM)
So basically, electropositivity is related to ECS?
Yes, and I believe that you have problems differentiating ECS and Reactivity Series?
Look, Electrochemical Series (ECS) is established to determine WHICH METALS COULD DISPLACE OTHER METALS FROM THEIR SALT SOLUTIONS. And I believe that you know that the more electropositive metal can displace a less electropositive metal from its salt solution. Therefore, the higher the position of metal, the more electropositive the metal.
For instance, Sodium is placed higher than Calcium in the Electrochemical Series, therefore Sodium is more electropositive than Calcium, NOTHING TO DO WITH REACTIVITY.
Whereas for Reactivity Series, it is PURELY ABOUT THE REACTIVITY OF A CERTAIN METAL.
According to the Reactivity series, anything higher than Hydrogen will be considered as a reactive metal and anything below it is considered as a less reactive metal. (Correct me with this part if I'm wrong)
For instance,
Magnesium is placed higher than Hydrogen in the Reactivity series, therefore its a reactive metal and you will use the crucible experiment.
Copper is placed lower than Hydrogen in the Reactivity Series, therefore its a less reactive metal and you will the "passing through dry hydrogen gas while heating metal oxide " experiment (forgot the name

)
This post has been edited by Screen: Oct 28 2013, 10:16 PM