Concept explainers
Consider the following unbalanced equation:
What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98% H2SO4 by mass)?
Interpretation: The amount of calcium sulfate and phosphoric acid that can be produced from the stated reaction is to be calculated.
Concept introduction: The mass of a substance can be obtained by using the number of moles of the substance present and its molar mass. The formula used to calculate the mass of a given substance is,
To determine: The mass of Calcium sulfate and phosphoric acid that can be formed by the stated reaction.
Answer to Problem 118E
The mass of calcium sulfate and phosphoric acid formed is
Explanation of Solution
To determine: The balanced form of the stated chemical equation.
According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed. Therefore a chemical equation, having lesser number of moles of an element on either side of a reaction, is balanced using appropriate numerical coefficients to satisfy the law of conservation of mass.
The given reaction is,
Adding the coefficient
Adding the coefficient
Given
The balanced chemical reaction is,
The given mass of
The given mass of concentrated
The given amount of concentrated sulfuric acid is given to have
Therefore, the mass of sulfuric acid
The molar mass of
The molar mass of
Formula
The number of moles of a substance is calculated by the formula,
Substitute the value of the given mass and the molar mass of
According to the stated reaction,
The moles of
Therefore, some amount of
According to the stated reaction,
The molar mass of
The mass of a substance is calculated by the formula,
Substitute the value of the number of moles of
Given
The balanced chemical reaction is,
According to the stated reaction,
The molar mass of
The mass of a substance is calculated by the formula,
Substitute the value of the number of moles of
The amount of calcium sulfate and phosphoric acid formed is
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Chapter 5 Solutions
CHEMISTRY:AN ATOMS FIRST...>CUSTOM PKG<
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