EVERYDAY SCIENCE

SCIENCE

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At the negative electrode copper ions get ____
A
reduced
B
oxidised
C
melted
D
excited
Explanation: 

Detailed explanation-1: -Cu+2 ions from the solution gets attracted by the negative electrode (cathode) which have excess electrons. These Cu+2 ions take the electrons from the cathode and thus gets reduced as Cu atoms.

Detailed explanation-2: -at the negative electrode, copper ions gain electrons and form copper atoms.

Detailed explanation-3: -The negative electrode is called cathode.At the cathode, each copper ion gains two electrons. They are said to be reduced because reduction is the gain of electrons. The ionic equation for the reduction process:Cu2+ (aq) + 2e—> Cu (s)Reduction of copper ion produces copper atom.

Detailed explanation-4: -Copper is less reactive than hydrogen, so copper (Cu) is produced at the negative electrode.

Detailed explanation-5: -Reduction happens at the negative cathode because this is where positive ions gain electrons. Oxidation happens at the positive anode because this is where negative ions lose electrons.

There is 1 question to complete.