How to prepare 1% acetic acid solution

In chemical experiments and daily life, the preparation of acetic acid solution is a common operation. Acetic acid solution is widely used in many fields, such as industry, laboratory and food processing. This article will introduce in detail how to prepare 1% acetic acid solution, and discuss the key steps and precautions.

1% Acetic Acid Solution Definition

We need to know what "1% acetic acid solution" means. 1% acetic acid solution refers to acetic acid (CHYCOOH) accounted for 1% of the mass of the solution. This means that in 100 grams of solution, there is 1 gram of acetic acid and the remaining 99 grams is water or other solvent. 1% acetic acid solution is commonly used in the laboratory as a reagent, or in the food industry as an acidity regulator.

How to prepare 1% acetic acid solution

Step 1: Calculate the required amount of acetic acid

When preparing a solution of any concentration, the first thing to know is the quality of acetic acid required. Suppose we need to prepare 1000 ml (I. e. 1 liter) of 1% acetic acid solution. A concentration of 1% means that the solution contains 1g of acetic acid per 100 ml. Therefore, 1000 ml of solution needs to contain 10g of acetic acid.

Step 2: Choose the appropriate acetic acid solution

If you are using concentrated acetic acid (usually 99% pure), you need to dilute it to get a 1% concentration. Assuming that you are using 99% concentrated acetic acid, to prepare 10 grams of acetic acid, you need to use the following formula to calculate:

[ \text {Volume of concentrated acetic acid required} = \frac{\text {Mass of acetic acid required }}{\ text {Concentration of concentrated acetic acid}} ]

for example:

[ \text {required volume of concentrated acetic acid} = \frac{10 \text {g }}{ 0.99} \approx 10.1 \text {ml}]

in other words, you need to take 10.1 ml of 99% concentrated acetic acid and dilute it to 1000 ml with water.

Step 3: Dilute and mix

Add the calculated concentrated acetic acid solution to the graduated cylinder and add a small amount of distilled water (deionized water is recommended). The solution was then gently stirred to ensure complete dissolution of the acetic acid. Continue to add water to 1000 ml to make sure the solution concentration is accurate.

Precautions

The Importance of Accuracy

Accuracy is very important when preparing a 1% acetic acid solution. Especially in the laboratory environment, the concentration of the prepared solution is too high or too low will affect the experimental results. Therefore, when using concentrated acetic acid for dilution, it is necessary to accurately calculate the volume and concentration of the solution.

Use appropriate containers

In order to ensure the accurate preparation of the solution, it is recommended to use glass or plastic measuring cylinder, beaker and other experimental equipment. Avoid using metal containers because acetic acid is corrosive and may react with metals.

solution preservation

1% acetic acid solution should be stored in a closed container to avoid reaction with carbon dioxide in the air, resulting in changes in the acidity of the solution. If the solution is exposed to air for a long time, it may cause the acetic acid concentration to decrease.

Summary

The preparation of 1% acetic acid solution is actually a relatively simple process, just follow certain steps to dilute and mix. In the process of preparation, accurate calculation, correct operation and proper equipment selection are the key to successful preparation. I hope this article can help you better understand how to prepare 1% acetic acid solution and apply it to actual needs.