
Concept explainers
(a)
Interpretation:
A balanced equation for the following reaction is to be written.
Concept introduction:
In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass.
Following are the steps to write a balanced chemical equation.
Step 1: Identify the most complex substance and choose an element such that the element must be present only in one reactant and one product. Place the stoichiometric coefficient before the element(s) such that the number of atoms of that element(s) is the same on both sides.
Step 2: Balance the remaining atoms by placing the
Step 3: In a balanced
Step 4: Check whether the chemical equation is balanced or not by counting the number of atoms of each element on both sides.
(a)

Answer to Problem 3.56P
The balanced chemical reaction is as follows:
Explanation of Solution
The equation implies that
Sulfur atoms are balanced, thus, place a 1 in front of
Balance copper
Check whether the equation is balanced or not as follows:
Atoms of each element are the same on both sides, thus, the chemical reaction is balanced.
The balanced chemical reaction is as follows:
(b)
Interpretation:
A balanced equation for the following reaction is to be written.
Concept introduction:
In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass.
Following are the steps to write a balanced chemical equation.
Step 1: Identify the most complex substance and choose an element such that the element must be present only in one reactant and one product. Place the stoichiometric coefficient before the element(s) such that the number of atoms of that element(s) is the same on both sides.
Step 2: Balance the remaining atoms by placing the stoichiometric coefficients before the element(s) such that the number of atoms of that element(s) is the same on both sides. Identify the least complex substance and end with it. Generally, oxygen atoms are balanced in last.
Step 3: In a balanced chemical reaction, the smallest whole number coefficients are most preferred. Hence, adjusting the coefficients in such a way that the smallest whole number coefficients are obtained for each element.
Step 4: Check whether the chemical equation is balanced or not by counting the number of atoms of each element on both sides.
(b)

Answer to Problem 3.56P
The balanced chemical reaction is as follows:
Explanation of Solution
The equation implies that
Phosphorous atoms are balanced, thus, place the coefficient 1 in front of
Next, balance hydrogen
Check whether the equation is balanced or not as follows:
Atoms of each element are the same on both sides, thus, the chemical reaction is balanced.
The balanced chemical reaction is as follows:
(c)
Interpretation:
A balanced equation for the following reaction is to be written.
Concept introduction:
In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass.
Following are the steps to write a balanced chemical equation.
Step 1: Identify the most complex substance and choose an element such that the element must be present only in one reactant and one product. Place the stoichiometric coefficient before the element(s) such that the number of atoms of that element(s) is the same on both sides.
Step 2: Balance the remaining atoms by placing the stoichiometric coefficients before the element(s) such that the number of atoms of that element(s) is the same on both sides. Identify the least complex substance and end with it. Generally, oxygen atoms are balanced in last.
Step 3: In a balanced chemical reaction, the smallest whole number coefficients are most preferred. Hence, adjusting the coefficients in such a way that the smallest whole number coefficients are obtained for each element.
Step 4: Check whether the chemical equation is balanced or not by counting the number of atoms of each element on both sides.
(c)

Answer to Problem 3.56P
The balanced chemical reaction is as follows:
Explanation of Solution
The equation implies that
Boron atoms are balanced, next, balance sodium
Sodium atoms are balanced, next, balance hydrogen
Hydrogen atoms are balanced, next, balance oxygen
Check whether the equation is balanced or not as follows:
Atoms of each element are the same on both sides, thus, the chemical reaction is balanced.
The balanced chemical reaction is as follows:
(d)
Interpretation:
A balanced equation for the following reaction is to be written.
Concept introduction:
In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass.
Following are the steps to write a balanced chemical equation.
Step 1: Identify the most complex substance and choose an element such that the element must be present only in one reactant and one product. Place the stoichiometric coefficient before the element(s) such that the number of atoms of that element(s) is the same on both sides.
Step 2: Balance the remaining atoms by placing the stoichiometric coefficients before the element(s) such that the number of atoms of that element(s) is the same on both sides. Identify the least complex substance and end with it. Generally, oxygen atoms are balanced in last.
Step 3: In a balanced chemical reaction, the smallest whole number coefficients are most preferred. Hence, adjusting the coefficients in such a way that the smallest whole number coefficients are obtained for each element.
Step 4: Check whether the chemical equation is balanced or not by counting the number of atoms of each element on both sides.
(d)

Answer to Problem 3.56P
The balanced chemical reaction is as follows:
Explanation of Solution
The equation implies that
Nitrogen atoms are balanced, hence, place the coefficient 1 in front of
Hydrogen atoms are balanced. Next, balance carbon
Carbon atoms are balanced, next, balance oxygen
Multiply the stoichiometric coefficients by 2 to remove the fraction as follows:
Check whether the equation is balanced or not as follows:
Atoms of each element are the same on both sides, thus, the chemical reaction is balanced.
The balanced chemical reaction is as follows:
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Chapter 3 Solutions
Chemistry: The Molecular Nature of Matter and Change - Standalone book
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