How to prepare 0.02N silver nitrate solution

To prepare a 0.02N (Normal) silver nitrate (AgNO3) solution, you will need to follow these steps:

1. Determine the molar mass of silver nitrate (AgNO3):

• Ag (silver) has a molar mass of 107.87 g/mol
• N (nitrogen) has a molar mass of 14.01 g/mol
• (oxygen) has a molar mass of 16.00 g/mol
• Total molar mass of AgNO3 = 107.87 + 14.01 + (3 × 16.00) = 169.87 g/mol

2. Calculate the grams of silver nitrate required to prepare the solution:

• The formula for calculating grams is: grams = normality × molar mass × volume (in liters)
• Given that the normality (N) is 0.02 and the volume will be determined later, we can calculate the grams of AgNO3.

3. Determine the volume of the solution you want to prepare:

• Let's assume you want to prepare 500 mL (0.5 L) of the silver nitrate solution.

4. Calculate the grams of silver nitrate needed:

• grams = 0.02 N × 169.87 g/mol × 0.5 L = 1.6987 grams

5. Weigh out the calculated mass of silver nitrate (1.6987 grams) using an analytical balance.

6. Dissolve the weighed silver nitrate in distilled water:

• Take a clean, dry container and add distilled water.
• Slowly add the weighed silver nitrate to the water while stirring continuously until it is completely dissolved.
• Ensure that all the solid AgNO3 is dissolved.

7. Transfer the solution to a volumetric flask:

• Once the silver nitrate is completely dissolved, transfer the solution to a 500 mL volumetric flask.
• Rinse the container used for dissolution and make sure all the solution is transferred.

8. Dilute the solution to the mark:

• Add distilled water to the volumetric flask gradually, while swirling gently, until the bottom of the meniscus aligns with the mark on the flask.
• Do not overshoot the mark. Add water cautiously to reach the desired volume.

9. Mix the solution:

• Cap the flask tightly and invert it several times to ensure proper mixing of the solution.

You have now prepared a 0.02N silver nitrate solution in a 500 mL volumetric flask. Remember to handle silver nitrate with care as it is toxic and can cause stains. Also, be cautious when using glassware and follow proper laboratory safety practices.

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.

Note:

Because the valency is 1, the molarity and normality of the AgNO3 solutions are the same.