I will use an electrolysis example to possibly give you a better understanding. This is a copper half equation.
The main points of half equations are:
Metals are always positively charged and non metals are negative.
When the two come together, they will form an ionic bond, by on donating electrons to the other to form a complete outer shell, this should not be confused with covalent bonding.
In electrolysis, the purifying of copper takes place at the negative electrode, or the 'cathode'.
Now finally for the half equation :) :
Cu2+ + 2e- -> Cu
The first part is the positively charged but impure copper.
The second part is the number of electrons which displace the impurities, which will often form a sludge at the bottom of the container this experiment is done in.
The last part is the final part of the equation, the pure copper.
I hope that this mad sense and that i did not blabble needlessly.
3Cu+2+2P04-3---->Cu3(PO4)2
Physical change
Half a pound
Solutions of copper (II) compounds will undergo precipitation reactions with sodium hydroxide solution when mixed together to produce a bright blue precipitate of copper (II) hydroxide and a solution of a sodium salt.The chemical equations for the reaction between Copper (II) nitrate and Sodium hydroxide are as follows:Cu(NO3)2 (aq) + 2NaOH (aq) → Cu(OH)2 (s) + 2NaNO3 (aq)Copper II nitrate + sodium hydroxide → copper II hydroxide + sodium nitrate
sand
it uses elctricity
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
due to the transfer of electron the zinc nitrate forms to zinc, and copper is formed to copper nitrate. this is usually followed by half equations which are: Cu -> Cu ^2+ + 2e zn^2+ + 2e -> zn where e is electrons and 2+ is representative of the nitrate
rmsvoltage
1/2
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
Half equations ?? The chemical formula of magnesium oxide is MgO.
Sulfuric acid plus copper (II) nitrate yields nitric acid plus copper (II) sulfate. Sulfuric acid plus copper (I) nitrate yields nitrous acid plus copper (I) sulfate.
Copper and nickel.
The product is copper ii chloride alongwith water, CuO + 2HCl = CuCl2 + H2O
Since 1971, U.S. half dollars have been made of nickel-coated copper (91.67% copper and 8.33% nickel).
Current half dollars are made copper and nickel.