Textbook Question
A chemist wants to make 5.5 L of a 0.300 M CaCl2 solution. What mass of CaCl2 (in g) should the chemist use?
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Ch.4 - Chemical Quantities & Aqueous Reactions
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving107
- Ch.2 - Atoms & Elements100
- Ch.3 - Molecules, Compounds & Chemical Equations127
- Ch.4 - Chemical Quantities & Aqueous Reactions114
- Ch.5 - Gases103
- Ch.6 - Thermochemistry92
- Ch.7 - Quantum-Mechanical Model of the Atom50
- Ch.8 - Periodic Properties of the Elements89
- Ch.9 - Chemical Bonding I: The Lewis Model84
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory74
- Ch.11 - Liquids, Solids & Intermolecular Forces60
- Ch.12 - Solids and Modern Material50
- Ch.13 - Solutions90
- Ch.14 - Chemical Kinetics111
- Ch.15 - Chemical Equilibrium65
- Ch.16 - Acids and Bases135
- Ch.17 - Aqueous Ionic Equilibrium145
- Ch.18 - Free Energy and Thermodynamics92
- Ch.19 - Electrochemistry100
- Ch.20 - Radioactivity and Nuclear Chemistry68
- Ch.21 - Organic Chemistry121
Chapter 4, Problem 58c
What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? c. 1.2⨉10-2 mol ethanol
Verified step by step guidance1
Determine the relationship between moles, molarity, and volume using the formula: Molarity (M) = \( \frac{\text{moles of solute}}{\text{volume of solution in liters}} \).
Rearrange the formula to solve for volume: Volume (L) = \( \frac{\text{moles of solute}}{\text{Molarity}} \).
Substitute the given values into the equation: moles of ethanol = 1.2 \(\times\) 10^{-2} \(\text{ mol}\) and Molarity = 0.200 \(\text{ M}\).
Calculate the volume in liters using the rearranged formula.
Convert the volume from liters to milliliters if necessary, knowing that 1 L = 1000 mL.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molarity (M)
Molarity is a measure of concentration defined as the number of moles of solute per liter of solution. It is expressed in moles per liter (mol/L). Understanding molarity is crucial for calculating the volume of a solution needed to achieve a specific number of moles of solute.
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Molarity Concept
Volume Calculation
To find the volume of a solution required to contain a certain number of moles of solute, the formula used is Volume (L) = Moles of solute / Molarity. This relationship allows for the determination of how much solution is needed based on its concentration and the desired amount of solute.
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Stoichiometry
Stoichiometry involves the calculation of reactants and products in chemical reactions. In this context, it helps in understanding the quantitative relationships between moles of ethanol and the volume of the solution, ensuring accurate measurements in chemical preparations.
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