How to Prepare 0.01N Sodium Thiosulfate from a 0.1N Solution

Introduction to Sodium Thiosulfate Concentration and Dilution

Sodium thiosulfate is a widely used compound in chemical analysis, particularly for titration and other redox reactions. The concentration of sodium thiosulfate can be adjusted to meet specific experimental requirements, such as preparing a 0.01N sodium thiosulfate solution from a 0.1N stock solution.

The Dilution Formula: A Step-by-Step Guide

When diluting a solution, you can use the dilution formula:

C1V1 C2V2

Where:

C1 initial concentration (0.1N) V1 volume of the initial solution to be diluted (in liters) C2 final concentration (0.01N) V2 final volume of the diluted solution (in liters)

The goal is to determine the volume of the initial solution needed to achieve the desired final concentration and volume.

Procedure for Preparing 0.01N Sodium Thiosulfate from 0.1N

Determine the Final Volume (V2):

You want to prepare 100 mL (0.1 L) of 0.01 N solution. Let's use V2 0.1 L.

Use the Dilution Formula:

0.1 N * V1 0.01 N * 0.1 L

V1 (0.01 N * 0.1 L) / 0.1 N

V1 0.01 L 10 mL

Perform the Dilution:

Measure 10 mL of the 0.1 N sodium thiosulfate solution. Add enough distilled water to make the total volume up to 100 mL.

Summary: To make 100 mL of 0.01 N sodium thiosulfate, dilute 10 mL of the 0.1 N sodium thiosulfate with distilled water to a final volume of 100 mL.

Dilution to 1 in 10 Ratio

In some cases, you might want to prepare a 1 in 10 dilution of a solution. Here's how to prepare this type of dilution:

Take 100 mL of your 0.1 N solution. Add this 100 mL to 900 mL of water (total volume of 1000 mL). This results in a 1 in 10 dilution of your original solution.

Conclusion and Further Reading

Understanding how to prepare and dilute solutions like sodium thiosulfate is crucial for accurate analysis and experimentation. This guide provides a clear method for diluting from a 0.1 N stock solution to a 0.01 N working solution, and also explains a 1 in 10 dilution.

For more information on chemical preparation, titration methods, and other related topics, refer to the resources in the 'Further Reading' section.

Further Reading

How to Calculate Dilutions Chem 111 Online Practice: Dilution Calculations Dilution Formula Explanation with Examples