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?(a) Calculate the molarity of a solution made by dissolving 12.5 grams of \(\mathrm{Na}_{2} \mathrm{CrO}_{4}\) in enough water to form exactly 750 mL

Chemistry: The Central Science | 14th Edition | ISBN: 9780134414232 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward; Matthew E. Stoltzfus ISBN: 9780134414232 1274

Solution for problem 4.62 Chapter 4

Chemistry: The Central Science | 14th Edition

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Chemistry: The Central Science | 14th Edition | ISBN: 9780134414232 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward; Matthew E. Stoltzfus

Chemistry: The Central Science | 14th Edition

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Problem 4.62

(a) Calculate the molarity of a solution made by dissolving 12.5 grams of \(\mathrm{Na}_{2} \mathrm{CrO}_{4}\) in enough water to form exactly 750 mL of solution.

(b) How many moles of KBr are present in 150 mL of a 0.112 M solution?

(c) How many milliliters of 6.1 M HCl solution are needed to obtain 0.150 mol of HCl?

Text Transcription:

Na2CrO4

Step-by-Step Solution:

Step 1 of 5) How many moles of KBr are present in 150 mL of a 0.112 M solutionHow many milliliters of 6.1 M HCl solution are needed to obtain 0.150 mol of HClIf a calorimetry experiment is carried out under a constant pressure, the heat transferred provides a direct measure of the enthalpy change of the reaction. Constant-volume calorimetry is carried out in a vessel of fixed volume called a bomb calorimeter. The heat transferred under constant-volume conditions is equal to ∆E. Corrections can be applied to ∆E values to yield ∆H.Because enthalpy is a state function, ∆H depends only on the initial and final states of the system. Thus, the enthalpy change of a process is the same whether the process is carried out in one step or in a series of steps. Hess’s law states that if a reaction is carried out in a series of steps, ∆H for the reaction will be equal to the sum of the enthalpy changes for the steps. We can therefore calculate ∆H for any process, as long as we can write the process as a series of steps for which ∆H is known.

Step 2 of 2

Chapter 4, Problem 4.62 is Solved
Textbook: Chemistry: The Central Science
Edition: 14
Author: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward; Matthew E. Stoltzfus
ISBN: 9780134414232

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?(a) Calculate the molarity of a solution made by dissolving 12.5 grams of \(\mathrm{Na}_{2} \mathrm{CrO}_{4}\) in enough water to form exactly 750 mL