How to prepare 0.025N silver nitrate solution

Properties of Silver nitrate (AgNO3)
Molecular weight	169.872 g·mol−1
Appearance	White powder
Melting point	209.7 °C
Density	4.35 g/cm3 (24°C) 3.97 g/cm3 (210°C)
Solubility	Soluble in water, acetone, alcohol, ammonia, ether, glycerol, etc.

To prepare a 0.025N silver nitrate (AgNO3) solution, you will need to follow these steps:

1. Determine the molar mass of silver nitrate (AgNO3). The molar mass of AgNO3 is approximately 169.87 g/mol.

2. Calculate the amount of AgNO3 needed to make the desired concentration. The formula to calculate the amount in grams is:

• Amount (g) = molarity (mol/L) * volume (L) * molar mass (g/mol)
• In this case, we want to prepare 0.025N solution, which means the molarity is 0.025 mol/L. The volume will depend on how much solution you want to make.

Let's assume you want to prepare 500 mL of the solution. The calculations would be as follows:

• Amount (g) = 0.025 mol/L * 0.5 L * 169.87 g/mol
• Amount (g) = 2.122 g
• Therefore, you would need approximately 2.122 grams of silver nitrate.

3. Weigh out the calculated amount of silver nitrate (2.122 gm) using an analytical balance. Make sure the balance is properly calibrated and that you use appropriate safety precautions when handling chemicals.

4. Dissolve the weighed silver nitrate in distilled or deionized water in a suitable container. You can start by adding a small amount of water to dissolve the solid and then gradually add more water while stirring until it is completely dissolved.

5. Once the silver nitrate is fully dissolved, transfer the solution to a volumetric flask of appropriate size (e.g., 500 mL). Rinse the container with distilled or deionized water to ensure all the solution is transferred.

6. Fill the volumetric flask up to the mark with distilled or deionized water while ensuring the bottom of the meniscus aligns with the mark on the flask. This step ensures the final volume is accurately measured.

7. Mix the solution gently by inverting the flask several times to ensure uniformity.

8. Label the container with the concentration, date of preparation, and any other relevant information.

PRECAUTIONS:

• When working with chemicals, avoid contact with skin, eyes, clothing, ingestion, and inhalation.
• Stir a little amount of silver nitrate into a large volume of water at a time, and then dilute the solution.
• When making silver nitrate solutions, it is recommended that always use distilled/deionized water.
• Wear protective gloves, clothing, eye protection, and face protection.
• Wash your hands/skin thoroughly after handling.
• The hazards of AgNO3 include its toxic and corrosive nature.
• Always use silver nitrate that has been previously dried at 105°C for 1 hour.
• Always store the silver nitrate in sealed containers or in a desiccator to protect from moisture and light.
• Silver nitrate produces a long-lasting stain when applied to the skin. You can remove it by applying household ammonia to the stained area of ​​the skin.