An aqueous solution of sodium sulfide is allowed to react with an aqueous solution of magnesium chloride.
The complete ionic equation contains which of the following species (when balanced in standard form)?

a.
Cl-(aq)

b.
2Na+(aq)

c.
2S2-(aq)

d.
Na+(aq)

e.
3Mg2+(aq)

Answer : The correct option is, (b)

Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The balanced molecular equation will be,

The complete ionic equation in separated aqueous solution will be,

In this equation the species are the spectator ions.

Hence, the complete ionic equation contains specie is

the solar system used to have much dust particles option no d

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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