Aqueous sodium sulfide reacts with aqueous copper(ii) nitrate to form aqueous sodium nitrate and solid copper(ii) sulfide. express your answer as a chemical equation. identify all of the phases in your answer.

The give reaction between sodium sulfide and copper nitrate to form sodium nitrate and copper sulfide is an example of double displacement reaction. In this reaction, one of the products is a solid and hence this is a precipitation reaction.

Word equation:  Sodium sulfide(aq) + Copper nitrate(aq)-->Sodium nitrate(aq)+Copper sulfide(aq)

Chemical equation:

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).