Question

Using the Activity Series, predict if the following reactions will occur. If there is no reaction, write 'NR' on the right hand side and if there is a reaction, write a balanced chemical equation for the reaction.

a) Fe(s) + Ca^2+(aq)

b) Copper (s) + HI(aq)

c) Mn(s) + Co^2+(s)

Answer 1

a) Fe(s) + Ca^2+(aq) --------------------> no reaction

b) Copper (s) + HI(aq) --------------------> no reaction

c) Mn(s) + Co^2+(s) ----------------------> Mn+2 (aq) + Co (s)

explanation:

a) Ca is more active metal than Fe so . Fe cannot replace Ca

b) copper is below to the standard hydrogen electrode .so it cannot replace hydrogen from acids

c) Mn reduction potential = -1.18 V

Co reduction potential =-0.28 V

so Mn is active metal than Co . Mn can replace Co+2 to Co