Explanation:Atomic number of sodium is 11 and its electronic distribution is 2, 8 , 1. And, atomic number of chlorine is 17 with electronic distribution as 2, 8, 7. So, when both sodium and chlorine chemically combine to each other then sodium will lose its one valence electron. This will form ion whereas chlorine atom on gaining an electron will form ion. Therefore, due to the presence of partial opposite charges both sodium and chlorine ions will be pulled closer to each other due to strong force of attraction.Hence, to break this strong ionic bond high heat has to be supplied. Therefore, melting point of NaCl is high. In the electrolytic refining of copper metal, oxidation takes place at the anode and reduction takes place at cathode. This means that anode is a thick block of impure copper metal from which pure copper metal gets oxidized to copper ion in the solution.Hence, at cathode thin strip of pure copper metal is placed where copper ions from the solution tend to reduce to copper metal and get deposited on the strip.
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4. aqueous ammonia
a)Na gives one e and Claims one e.
b) anode is pure Cu and cathode is impure Cu
Cathode --- positive terminal of the battery...
Anode -- negative terminal of the battery
Anode is made up of impure copper , cathode is made up of pure copper and electrolyte is copper sulphate solution
Cathode and anode cathode and amode na hde najw
(a) K. L. M
Cl=. 2. 8. 7. (-1)
Na=. 2. 8. 1. (+1)
(b) Cl =7
(c) Na. Cl
By chemical formula .
Na take -1 ,and take+1.
(d) Generally ionic compounds have high melting points. The electrostatic attraction (ionic bond) between cations and anions is strong. It takes a lot of energy to overcome this attraction in order to allow the ions to move more freely and form a liquid. In Sodium chloride, NaCl which is an ionic compound in its crystal structure, each sodium ion (Na+) interacts with 6 chloride ions (Cl-) on each side of it, and each Cl- interacts with the 6 Na+ around it and as a whole has strong electrostatic attractions between the Na+ and Cl- ions, and it takes a lot of energy to overcome them. Hence NaCl has high melting and as well as high boiling points.
Explanation:a)as it is an ionic bond it more m.p
cathode=pure strip of copper
here's your answer mate!
one is pure copper as anode
one is impure copper as a impure copper