Chapter 20, Problem 90A

(a)

Interpretation Introduction

Interpretation: Whether $S$ , sulfur is a non-electrolyte is to be determined.

Concept Introduction: Electrolytes are chemical compounds that undergo dissociation when dissolved in water. And they exist in the ionic form and has ionic bond present in them. Non-electrolytes are the species that do not undergo dissociation when dissolved in water. And the bond present on them is a covalent bond.

Answer to Problem 90A

  $S$ is a non-electrolyte.

Explanation of Solution

In the given species, $S\left(s\right)$ , sulfur is an element, not a compound. And do not undergo dissociation when dissolved in water. So it is a non-electrolyte.

(b)

Interpretation Introduction

Interpretation: Whether $N{H}_{4}Cl$ , ammonium chloride is a non-electrolyte or not is to be determined.

Concept Introduction: Electrolytes are chemical compounds that undergo dissociation when dissolved in water. And they exist in the ionic form and have ionic bonds present in them. Non-electrolytes are the species that do not undergo dissociation when dissolved in water. And the bond present on them is a covalent bond.

Answer to Problem 90A

  $N{H}_{4}Cl$ , ammonium chloride is not a non-electrolyte.

Explanation of Solution

The given species, $N{H}_{4}Cl$ is an ionic compound. It will undergo dissociation when dissolved in water as,

  $N{H}_{4}Cl\to N{H}_4{}^{+}+C{l}^{-}$

So, it is an electrolyte and not a non-electrolyte.

(c)

Interpretation Introduction

Interpretation: Whether $Si{O}_2$ , is a non-electrolyte or not is to be determined.

Concept Introduction: Electrolytes are chemical compounds that undergo dissociation when dissolved in water. And they exist in the ionic form and has ionic bond present in them. Non-electrolytes are the species that do not undergo dissociation when dissolved in water. And the bond present on them is a covalent bond.

Answer to Problem 90A

  $Si{O}_2$ is a non-electrolyte.

Explanation of Solution

The given species, $Si{O}_2$ is a covalent compound. So, it will not undergo dissociation when dissolved in water. Therefore it is a non-electrolyte.

(d)

Interpretation Introduction

Interpretation: Whether $F_2$ is a non-electrolyte or not is to be determined.

Concept Introduction: Electrolytes are chemical compounds that undergo dissociation when dissolved in water. And they exist in the ionic form and have ionic bonds present in them. Non-electrolytes are the species that do not undergo dissociation when dissolved in water. And the bond present on them is a covalent bond.

Answer to Problem 90A

  $F_2$ is a non-electrolyte.

Explanation of Solution

The given species, $F_2$ is a covalent compound. So it will not dissociate into respective ions upon dissolving in water. It is a non-electrolyte.