Q1. 20 g of NaCl is dissolved in 250 g of water.Calculate mass percent composition of this solution.Q2. 10 g of NAOH is dissolved in 500 mL of water.Calculate the molarity of this solution. (Molar mass ofNaOH= 40 g).Q3. 31 g of benzoic acid is dissolved in 250 g of water.Calculate the molality of this solution. (Molar mass ofBenzoic acid= 122.12 g).Q4. Calculate the mole fraction of X solute with 0.3 molein a mixture of solutes (XYZ) where Y as 0.5 mole and Zis 0.7 mole.

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Answered: Q2. 10 g of NaOH is dissolved in 500 mL…

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Q2. 10 g of NaOH is dissolved in 500 mL of water. Calculate the molarity of this solution. (Molar mass of NaOH= 40 g).

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 65QRT

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Q1. 20 g of NaCl is dissolved in 250 g of water.
Calculate mass percent composition of this solution.
Q2. 10 g of NAOH is dissolved in 500 mL of water.
Calculate the molarity of this solution. (Molar mass of
NaOH= 40 g).
Q3. 31 g of benzoic acid is dissolved in 250 g of water.
Calculate the molality of this solution. (Molar mass of
Benzoic acid= 122.12 g).
Q4. Calculate the mole fraction of X solute with 0.3 mole
in a mixture of solutes (XYZ) where Y as 0.5 mole and Z
is 0.7 mole.

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