Calculate The Mass Percent Of A NaCl Solution Prepared By Mixing 47.0 G NaCl With 125.0 ML Of Pure Water.A. 37.6%B. 47.0%C. 27.3%D. 72.3%

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Understanding Mass Percent

Mass percent is a measure of the concentration of a solution, expressed as a percentage of the mass of the solute in relation to the total mass of the solution. It is an essential concept in chemistry, particularly in the study of solutions and their properties. In this article, we will calculate the mass percent of a NaCl solution prepared by mixing 47.0 g of NaCl with 125.0 mL of pure water.

Calculating Mass Percent of a NaCl Solution

To calculate the mass percent of the NaCl solution, we need to follow these steps:

  1. Calculate the mass of the solution: First, we need to calculate the mass of the solution. To do this, we need to know the density of water, which is approximately 1.0 g/mL. We can calculate the mass of the water by multiplying the volume of the water (125.0 mL) by its density (1.0 g/mL).

    Mass of water: 125.0 mL x 1.0 g/mL = 125.0 g

  2. Calculate the total mass of the solution: Next, we need to calculate the total mass of the solution by adding the mass of the NaCl (47.0 g) to the mass of the water (125.0 g).

    Total mass of the solution: 47.0 g + 125.0 g = 172.0 g

  3. Calculate the mass percent of NaCl: Finally, we can calculate the mass percent of NaCl by dividing the mass of the NaCl (47.0 g) by the total mass of the solution (172.0 g) and multiplying by 100.

    Mass percent of NaCl: (47.0 g / 172.0 g) x 100 = 27.3%

Conclusion

In this article, we calculated the mass percent of a NaCl solution prepared by mixing 47.0 g of NaCl with 125.0 mL of pure water. We followed the steps outlined above to calculate the mass percent of the solution, which came out to be 27.3%. This result is consistent with the expected value, and it demonstrates the importance of accurately calculating the mass percent of a solution in chemistry.

Calculating Mass Percent of a NaCl Solution: Step-by-Step

Step 1: Calculate the Mass of the Solution

  • Mass of water: 125.0 mL x 1.0 g/mL = 125.0 g
  • Total mass of the solution: 47.0 g + 125.0 g = 172.0 g

Step 2: Calculate the Mass Percent of NaCl

  • Mass percent of NaCl: (47.0 g / 172.0 g) x 100 = 27.3%

Calculating Mass Percent of a NaCl Solution: Common Mistakes

When calculating the mass percent of a solution, it is essential to avoid common mistakes that can lead to incorrect results. Some of these mistakes include:

  • Incorrect calculation of the mass of the solution: This can occur if the density of the solvent is not accurately known or if the volume of the solvent is not correctly measured.
  • Incorrect calculation of the mass percent of the solute: This can occur if the mass of the solute is not accurately known or if the total mass of the solution is not correctly calculated.
  • Failure to account for the density of the solute: This can occur if the density of the solute is not accurately known or if it is not taken into account when calculating the mass percent of the solution.

Calculating Mass Percent of a NaCl Solution: Real-World Applications

Calculating the mass percent of a solution is an essential concept in chemistry, with numerous real-world applications. Some of these applications include:

  • Pharmaceutical industry: The mass percent of a solution is critical in the pharmaceutical industry, where it is used to determine the concentration of active ingredients in medications.
  • Food industry: The mass percent of a solution is also important in the food industry, where it is used to determine the concentration of ingredients in food products.
  • Environmental monitoring: The mass percent of a solution is used in environmental monitoring to determine the concentration of pollutants in water and air samples.

Calculating Mass Percent of a NaCl Solution: Conclusion

Q: What is mass percent?

A: Mass percent is a measure of the concentration of a solution, expressed as a percentage of the mass of the solute in relation to the total mass of the solution.

Q: How do I calculate the mass percent of a solution?

A: To calculate the mass percent of a solution, you need to follow these steps:

  1. Calculate the mass of the solution: First, you need to calculate the mass of the solution. To do this, you need to know the density of the solvent and the volume of the solvent.
  2. Calculate the total mass of the solution: Next, you need to calculate the total mass of the solution by adding the mass of the solute to the mass of the solvent.
  3. Calculate the mass percent of the solute: Finally, you can calculate the mass percent of the solute by dividing the mass of the solute by the total mass of the solution and multiplying by 100.

Q: What are some common mistakes to avoid when calculating mass percent?

A: Some common mistakes to avoid when calculating mass percent include:

  • Incorrect calculation of the mass of the solution: This can occur if the density of the solvent is not accurately known or if the volume of the solvent is not correctly measured.
  • Incorrect calculation of the mass percent of the solute: This can occur if the mass of the solute is not accurately known or if the total mass of the solution is not correctly calculated.
  • Failure to account for the density of the solute: This can occur if the density of the solute is not accurately known or if it is not taken into account when calculating the mass percent of the solution.

Q: What are some real-world applications of calculating mass percent?

A: Calculating mass percent has numerous real-world applications, including:

  • Pharmaceutical industry: The mass percent of a solution is critical in the pharmaceutical industry, where it is used to determine the concentration of active ingredients in medications.
  • Food industry: The mass percent of a solution is also important in the food industry, where it is used to determine the concentration of ingredients in food products.
  • Environmental monitoring: The mass percent of a solution is used in environmental monitoring to determine the concentration of pollutants in water and air samples.

Q: How do I calculate the mass percent of a NaCl solution?

A: To calculate the mass percent of a NaCl solution, you need to follow these steps:

  1. Calculate the mass of the solution: First, you need to calculate the mass of the solution. To do this, you need to know the density of water and the volume of water.
  2. Calculate the total mass of the solution: Next, you need to calculate the total mass of the solution by adding the mass of the NaCl to the mass of the water.
  3. Calculate the mass percent of NaCl: Finally, you can calculate the mass percent of NaCl by dividing the mass of the NaCl by the total mass of the solution and multiplying by 100.

Q: What is the mass percent of a NaCl solution prepared by mixing 47.0 g of NaCl with 125.0 mL of pure water?

A: To calculate the mass percent of the NaCl solution, we need to follow the steps outlined above. First, we need to calculate the mass of the solution by multiplying the volume of the water (125.0 mL) by its density (1.0 g/mL).

**Mass of water**: 125.0 mL x 1.0 g/mL = 125.0 g

Next, we need to calculate the total mass of the solution by adding the mass of the NaCl (47.0 g) to the mass of the water (125.0 g).

**Total mass of the solution**: 47.0 g + 125.0 g = 172.0 g

Finally, we can calculate the mass percent of NaCl by dividing the mass of the NaCl (47.0 g) by the total mass of the solution (172.0 g) and multiplying by 100.

**Mass percent of NaCl**: (47.0 g / 172.0 g) x 100 = 27.3%

Q: What are some other ways to calculate mass percent?

A: There are several other ways to calculate mass percent, including:

  • Using a mass percent calculator: A mass percent calculator is a tool that can be used to calculate the mass percent of a solution.
  • Using a spreadsheet: A spreadsheet can be used to calculate the mass percent of a solution by following the steps outlined above.
  • Using a calculator: A calculator can be used to calculate the mass percent of a solution by following the steps outlined above.

Q: What are some common mistakes to avoid when using a mass percent calculator or spreadsheet?

A: Some common mistakes to avoid when using a mass percent calculator or spreadsheet include:

  • Incorrect input of values: This can occur if the values are not accurately entered into the calculator or spreadsheet.
  • Incorrect calculation of the mass percent: This can occur if the calculation is not performed correctly.
  • Failure to account for the density of the solute: This can occur if the density of the solute is not accurately known or if it is not taken into account when calculating the mass percent of the solution.