Pembuatan larutan AgNO3

Summary

This video demonstrates the process of preparing a 0.1 M silver nitrate (AgNO₃) solution. The presenters introduce the materials and equipment needed, including AgNO₃, distilled water, and various lab tools. They then guide viewers through the steps: checking the purity of water, dissolving AgNO₃, transferring the solution to a volumetric flask, and properly labeling and storing the final solution. The importance of ensuring water purity and avoiding contamination with chloride ions is emphasized to prevent unwanted reactions. The video concludes with a final reminder to store the solution in a dark place.

Takeaways

• 😀 The script demonstrates how to prepare a 0.1 M AgNO3 solution.
• 😀 The required materials include Silver Nitrate (AgNO3), aquades, and several laboratory tools.
• 😀 It is crucial to ensure that the aquades (distilled water) is free of chlorine (Cl-) before use.
• 😀 The purity of the aquades is tested by using a reagent to confirm there is no chlorine contamination.
• 😀 Silver Nitrate (AgNO3) must be weighed accurately at 1.7 g for a 0.1 M solution.
• 😀 The AgNO3 is dissolved in aquades in a 100 mL beaker using a stirring rod.
• 😀 The dissolved AgNO3 is then transferred to a 100 mL volumetric flask.
• 😀 After transferring the solution, the volume is adjusted by adding more aquades until it reaches the 100 mL mark.
• 😀 Homogenize the solution to ensure that it is well-mixed.
• 😀 The final AgNO3 solution should be stored in a dark place, sealed with aluminum foil to protect it from light.

Q & A

What is the purpose of checking the aquades (distilled water) in the preparation of the AgNO3 solution?

The aquades is checked to ensure that it does not contain chloride (Cl-) ions. If it contains Cl-, it would react with silver nitrate (AgNO3) to form silver chloride (AgCl), which would affect the solution's purity.

What should be done if the aquades shows any cloudiness?

If the aquades shows any cloudiness, it should not be used in the preparation of the AgNO3 solution, as it indicates contamination, potentially with chloride ions.

Why is it important to use a clean beaker when preparing the AgNO3 solution?

Using a clean beaker ensures that no contaminants interfere with the preparation process, which could alter the concentration or properties of the AgNO3 solution.

What is the first step in preparing the AgNO3 solution?

The first step is to check the aquades for clarity and the absence of chloride ions using the reagent (AgNO3).

How is the AgNO3 dissolved in the preparation process?

The weighed AgNO3 is added to a beaker containing the checked aquades, and it is then stirred with a stirring rod until fully dissolved.

What should be done after dissolving the AgNO3 in water?

After dissolving the AgNO3, the solution is transferred to a volumetric flask, and more aquades is added to achieve the desired final volume.

Why is it important to homogenize the solution after reaching the final volume?

Homogenizing the solution ensures that the AgNO3 is evenly distributed throughout the solution, resulting in a consistent concentration.

What is the purpose of using a funnel and pipet in the preparation of the AgNO3 solution?

A funnel and pipet are used to accurately transfer the dissolved AgNO3 solution into the volumetric flask without spilling or contaminating the solution.

What precaution should be taken when transferring the solution into the bottle?

The bottle should be labeled properly, and it should be sealed with aluminum foil to prevent contamination and ensure the solution's stability.

How should the AgNO3 solution be stored after preparation?

The prepared AgNO3 solution should be stored in a dark place to prevent degradation, as light can cause the silver nitrate to decompose.