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Calculating the Amount of NaCl Needed for a Given Volume of 8.0% NaCl Solution

January 07, 2025Health4801
Calculating the Amount of N

Calculating the Amount of NaCl Needed for a Given Volume of 8.0% NaCl Solution

When preparing a solution, understanding the concentration and the amount of solute required is crucial. A common requirement is to create an 8.0% solution of NaCl, meaning 8.0 grams of NaCl are contained within 100 grams of the solution. This guide will walk you through the steps to calculate and prepare a 77 grams of 8.0% NaCl solution using simple arithmetic and basic laboratory practices.

Calculating the Amount of NaCl Required

Let's determine how many grams of NaCl are needed to make 77 grams of an 8.0% solution. An 8.0% solution implies that for every 100 grams of solution, 8.0 grams of NaCl are present. Therefore, to find the amount of NaCl in 77 grams of solution, we use the following ratio:

8g/100g x g/77g

Solving for x, we get:

x (8g/100g) * 77g 6.16g

This means that 6.16 grams of NaCl are required to make 77 grams of the 8.0% NaCl solution.

Preparation of the Solution

The preparation of the solution involves a few precise steps to ensure accuracy and consistency. Follow these steps to create your 77 grams of 8.0% NaCl solution:

Weighing the NaCl: Begin by placing a 100 ml or 200 ml clean, dry, and empty beaker on an electronic balance. Set the balance reading to zero. Then, carefully add powdered anhydrous NaCl to the beaker until the digital reading reaches 6.16 grams.

Diluting with Distilled Water: Use a wash bottle to carefully add distilled water to the beaker until the total mass of the solution is 77 grams. This step is crucial to achieve the desired concentration.

How to Prepare Your Solution

The process of preparing a 77 grams of 8.0% NaCl solution involves the following steps:

Set up the balance: Place a 100 ml or 200 ml clean, dry, and empty beaker on an electronic balance, ensuring the display reads zero.

Add the NaCl: Carefully add the powdered anhydrous salt to the beaker in small increments until the digital reading reaches 6.16 grams. This step requires precision to achieve the desired weight.

Adjust with distilled water: Using a wash bottle, add distilled water to the beaker to achieve a total mass of 77 grams. This step is essential to attain the target concentration of the solution.

Conclusion

By following these steps, you can accurately prepare a 77 grams of an 8.0% NaCl solution. Precision in weighing and careful addition of distilled water are key to obtaining the desired concentration. Understanding the principles of solution preparation is vital in various scientific and chemical applications.

References

1. Web Archive of Britannica on Solution Chemistry

2. ScienceDirect on NaCl Solutions