Chemistry, 11.12.2019 02:31 savannahvargas512

Which of the following solutions contains the smallest number of ions? a. 156.5 ml of 2.0 m iron(iii) chloride b. 521.4 ml of 1.0 m lithium nitrate c. 374.3 ml of 2.0 m potassium hydroxide d. at least two of the above contain the smallest number of ions. e. 297.1 ml of 1.0 m sodium sulfate

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Answer from: peggycab4201

297.1 mL of 1.0 M sodium sulfate has smallest number of ions.

Explanation:

$Moles (n)=Molarity(M)\times Volume (L)$

A) 156.5 mL of 2.0 M iron(III) chloride

Volume of iron(III) chloride solution = 156.5 mL = 0.1565 L

Molarity of the iron(III) chloride = 2.0 M

Moles of iron(III) chloride = n

$n=2.0 M\times 0.1565 L=0.313 mol$

1 mole of iron(III) chloride gives 1 mol ferric ion and 3 mol chloride ions.

Number of ferric ions = 0.313 mol

Number of chloride ions = 0.313 mol × 3 = 0.939 mol

Total moles of ions = 1.252 moles

B) 521.4 mL of 1.0 M lithium nitrate:

Volume of lithium nitrate solution = 521.4 mL = 0.5214 L

Molarity of the lithium nitrate = 1.0 M

Moles of lithium nitrate = n

$n=1.0 M\times 0.5214 L=0.5214 mol$

1 mole of lithium nitrate gives 1 mol lithium ion and 1 mol nitrate ions.

Number of lithium ions = 0.5214 mol

Number of nitrate ions = 0.5214 mol

Total moles of ions = 1.0428 mol

C) 374.3 mL of 2.0 M potassium hydroxide :

Volume of potassium hydroxide solution = 374.3 mL = 0.3743 L

Molarity of the potassium hydroxide = 2.0 M

Moles of potassium hydroxide = n

$n=2.0 M\times 0.3743 L=0.7486 mol$

1 mole of potassium hydroxide gives 1 mol potassium ion and 1 mol hydroxide ions.

Number of potassium ions = 0.7486 mol

Number of hydroxide ions = 0.7486 mol

Total moles of ions = 1.4972 mol

E) 297.1 mL of 1.0 M sodium sulfate:

Volume of sodium sulfate solution = 297.1 mL = 0.2971 L

Molarity of the sodium sulfate = 1.0 M

Moles of sodium sulfate = n

$n=1.0 M\times 0.2971 L=0.2971 mol$

1 mole of sodium sulfate gives 1 mol sodium ion and 2 mol sulafte ions.

Number of sodium ions = 0.2971 mol

Number of sulfate ions = 0.2971 mol × 2 = 0.5942 mol

Total moles of ion = 0.8913 mol

Higher the number of moles more with number of ions in the solution and vice-versa.

297.1 mL of 1.0 M sodium sulfate has smallest number of ions.

Answer from: Quest

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Answer from: Quest

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

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Which of the following solutions contains the smallest number of ions? a. 156.5 ml of 2.0 m iron(ii...