Question

Which compound produces the greatest number of ions when one mole of it is dissolved in water?

Answer 1

Question is complete , here is the complete question:

Which compound produces the greatest number of ions when one mole of it is dissolved in water?

a. NaCl b.
`NH_4Cl` c.
`NH_4NO_3` d.
`Na_2SO_4`

Answer:

The correct answer is option d.

Step-by-step explanation:

Number of ions : N

`N=n* N_A=n* 6.022* 10^(23)`

Higher the number of moles of more will be the number of ions.

a) When sodium chloride dissolve in water it gives sodium ions and chloride ions.

`NaCl(aq)\rightarrow Na^(+)(aq)+Cl^-(aq)`

1 mole gives 1 mole of sodium ions and 1 mole of chloride ions.So, 2 moles of ions are produced.

b) When ammonium chloride dissolve in water it gives ammonium ions and chloride ions.

`NH_4Cl(aq)\rightarrow NH_4^(+)(aq)+Cl^-(aq)`

1 mole gives 1 mole of ammonium ions and 1 mole of chloride ions.So, 2 moles of ions are produced.

c) When ammonium nitrate dissolve in water it gives sodium ions and chloride ions.

`NH_4NO_3(aq)\rightarrow NH_4^(+)(aq)+NO_3^(-)(aq)`

1 mole gives 1 mole of ammonium ions and 1 mole of nitrate ions.So, 2 moles of ions are produced.

d) When sodium sulfate dissolve in water it gives sodium ions and chloride ions.

`NaSO_4(aq)\rightarrow 2Na^(+)(aq)+SO_4^(2-)(aq)`

1 mole gives 2 mole of sodium ions and 1 mole of sulfate ions ions.So, 3 moles of ions are produced.

Number of moles of ions dissolving of 1 mole of sodium sulfate in water is maximum and so will be the number of ions.Hence option d is correct.