Concept explainers
(a)
Interpretation:
The balance chemical equation for the reaction of solution of potassium chromate with solution of lead (II) nitrate needs to be determined. It produces a yellow precipitate of lead (II) chromate with a solution of potassium nitrate.
Concept introduction:
The mole concept provides the relation between moles, mass and molar mass. The mathematical expression of mole concept can write as:
1 mole of any substance contains
(a)
Answer to Problem 65A
Explanation of Solution
The reaction of solution of potassium chromate with solution of lead (II) nitrate. It produces a yellow precipitate of lead (II) chromate with a solution of potassium nitrate.
The balance reaction must have all the atoms same at both sides of the reaction equation. Thus the balance equation can be written as:
(b)
Interpretation:
The mass of lead chromate formed from 0.250 moles of potassium chromate for the given reaction needs to be determined.
Concept introduction:
The mole concept provides the relation between moles, mass and molar mass. The mathematical expression of mole concept can write as:
1 mole of any substance contains
(b)
Answer to Problem 65A
Explanation of Solution
The reaction of solution of potassium chromate with solution of lead (II) nitrate. It produces a yellow precipitate of lead (II) chromate with a solution of potassium nitrate.
The mole ratio relates the moles of reactant with other reactant and product molecules in the balance chemical equation.
Moles of potassium chromate = 0.250 moles
Molar mass of lead chromate = 323 g/mol
1 mole of sodium potassium chromate = 1 mole of lead chromate
Calculate mass of lead chromate with the help of mole ratio:
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Glencoe Chemistry: Matter and Change, Student Edition
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