Practice Mole Fraction (x) (2.3.6) - Chapter 2: Solutions - ICSE 12 Chemistry

Practice: Mole Fraction (x)

Lesson 2.3.6Solutions

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6 sample questions

Question 1.
If you have 5 moles of salt and 10 moles of water in a solution, what is the mole fraction of the salt?
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Use the formula: \\(x_A = \\frac{n_A}{n_{total}}\\).
Question 2.
What is the mole fraction of a solvent in a solution containing 4 moles of solute and 6 moles of solvent?
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Remember, total moles = solute + solvent.
3Question 3.
What does mole fraction represent?
- Total moles in a solution
- Ratio of component moles to total moles
- Concentration in mL
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Remember it involves the components in the solution.
4Question 4.
True or False: Mole fraction can be greater than 1.
- True
- False
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Think of how ratios work.
Question 5.
In a laboratory, a chemist mixes 2 moles of NaCl, 1 mole of KCl, and 4 moles of water. Calculate the mole fraction of each component and explain the importance of those calculations in solution chemistry.
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Remember to use \\(x = \\frac{n}{n_{total}}\\).
Question 6.
During an experiment, 3 moles of CO2 is mixed with 2 moles of O2 and 5 moles of N2. Calculate the mole fraction of CO2 and discuss its role in aerobic respiration.
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Use the sum of all moles for your calculation.

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