# Which Statement Best Describes the Process of Making a Solution by Diluting a Stock Solution

Which Statement Best Describes the Process of Making a Solution by Diluting a Stock Solution

When it comes to creating solutions in a laboratory setting, one common technique involves diluting a stock solution. This process allows scientists to adjust the concentration of a solution to meet their specific experimental needs. In this article, we will explore the steps involved in making a solution by diluting a stock solution and discuss some frequently asked questions about this process.

The process of making a solution by diluting a stock solution can be summarized by the following statement: Diluting a stock solution involves adding a specific volume of solvent to a known volume of a concentrated solution to achieve the desired concentration.

To better understand this process, let’s break down the steps involved:

Step 1: Determine the desired concentration
Before beginning the dilution process, it is crucial to establish the desired concentration of the final solution. This concentration will depend on the experimental requirements and the purpose of the solution.

Step 2: Calculate the dilution factor
The dilution factor is the ratio of the final volume of the diluted solution to the initial volume of the stock solution. It can be calculated using the following formula:

Dilution factor = Final volume / Initial volume

Step 3: Measure the stock solution
Using a pipette or a burette, measure the desired volume of the stock solution. Ensure accuracy in measurement as it will directly affect the final concentration of the diluted solution.

Transfer the measured volume of the stock solution into a suitable container. Next, add the solvent (such as water or another appropriate liquid) to reach the desired final volume. Ensure thorough mixing to achieve homogeneity.

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Step 5: Verify the concentration
After completing the dilution process, it is essential to verify the concentration of the final solution. This can be done using various analytical techniques, such as spectrophotometry or titration.

FAQs:

Q1: Why is it necessary to dilute a stock solution?
A1: Diluting a stock solution allows scientists to adjust the concentration of a solution to meet their experimental requirements. It provides flexibility in working with different concentration ranges and enables accurate measurements.

Q2: Is it important to maintain accuracy in measurement during the dilution process?
A2: Yes, accuracy in measurement is crucial. Any errors in measuring the stock solution or the solvent can result in an incorrect final concentration. Precise measurement ensures reproducibility and reliability of experimental results.

Q3: Can any solvent be used for dilution?
A3: No, it is essential to choose a suitable solvent that will not react with the stock solution or alter its properties. Water is often the most commonly used solvent for dilution due to its availability, low cost, and compatibility with many substances.

Q4: How can I ensure thorough mixing during the dilution process?
A4: Thorough mixing can be achieved by using a magnetic stirrer, a vortex mixer, or simply by gently swirling the container. This ensures the homogeneous distribution of the solute throughout the solution.

Q5: What if I accidentally add too much solvent during dilution?
A5: If you accidentally add too much solvent, resulting in a lower concentration than desired, the solution can be concentrated again by evaporating some of the solvent under controlled conditions.

In conclusion, the process of making a solution by diluting a stock solution involves adding a specific volume of solvent to a known volume of a concentrated solution to achieve the desired concentration. This technique allows scientists to adjust the concentration of a solution to meet their specific experimental needs. Accurate measurement, appropriate solvent selection, and thorough mixing are essential for successful dilution.