Concept explainers
(a)
Interpretation: The formula for the oxide of potassium element needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(a)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given element is potassium. The stable charge on potassium or K is +1 as it is an alkali metal. The stable charge on O atom is -2.
To form a stable or neutral compound, K and O must be combined in 2:1 ratio thus, formula will be K2O.
Element | Ions Present | Formula |
Potassium |
(b)
Interpretation: The formula for the oxide of magnesium element needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(b)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given element is magnesium. The stable charge on magnesium or Mg is +2 as it is an alkaline earth metal. The stable charge on O atom is -2.
To form a stable or neutral compound, Mg and O must be combined in 2:2 ratio thus, formula will be MgO.
Element | Ions Present | Formula |
Magnesium |
(c)
Interpretation: The formula for the oxide of iron (II) needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(c)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given ion is iron (II). From the name, Fe has +2 charge. The stable charge on O atom is -2.
To form a stable or neutral compound, Fe and O must be combined in 2:2 ratio thus, formula will be FeO.
Element | Ions Present | Formula |
Iron(II) |
(d)
Interpretation: The formula for the oxide of iron (III) needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(d)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given ion is iron (III). From the name, Fe has +3 charge. The stable charge on O atom is -2.
To form a stable or neutral compound, Fe and O must be combined in 2:3 ratio thus, formula will be Fe2O3.
Element | Ions Present | Formula | Comments |
Iron(III) | 2 |
(e)
Interpretation: The formula for the oxide of zinc needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(e)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given element is zinc. The stable charge on zinc is +2. The stable charge on O atom is -2.
To form a stable or neutral compound, Mg and O must be combined in 2:2 ratio thus, formula will be ZnO.
Element | Ions Present | Formula |
Zinc |
(f)
Interpretation: The formula for the oxide of lead needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(f)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given element is lead. The stable charge on lead is +2. The stable charge on O atom is -2.
To form a stable or neutral compound, Pb and O must be combined in 2:2 ratio thus, formula will be PbO.
Element | Ions Present | Formula |
Lead(II) |
(g)
Interpretation: The formula for the oxide of aluminium needs to be written.
Concept introduction: Binary ionic compound: A two-element compound consisting of a cation and an anion.
(g)
Answer to Problem 34A
Explanation of Solution
The oxide is a binary compound with oxygen and some other element or group. The given element is aluminium. The stable charge on aluminium is +3. The stable charge on O atom is -2.
To form a stable or neutral compound, Al and O must be combined in 2:3 ratio thus, formula will be
Element | Ions Present | Formula |
Aluminum |
Chapter 4 Solutions
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