Percobaan Pembuatan Larutan | Lab Kimia | UPT Laboratorium UHO

Summary

This video provides a tutorial on preparing chemical solutions in a laboratory setting. It covers the steps for creating solutions of H2SO4, NaOH, and HCl with specific concentrations. The procedure involves weighing materials, dissolving them in water, and homogenizing the solutions. Essential laboratory tools such as volumetric flasks, pipettes, and stirring rods are used. The video emphasizes understanding solubility and concentration concepts like molarity and provides clear instructions for students to follow. It's a useful guide for anyone learning basic laboratory techniques and solution preparation.

Takeaways

• 🎶 The video welcomes viewers to an experiment on solution preparation.
• 🔬 The purpose of the experiment is to help students understand the solubility properties of compounds and learn how to make solutions with specific concentrations.
• 🧪 The materials used include a 50 mL volumetric flask, analytical balance, 50 mL beaker, stirring rod, volumetric pipette, 1 molar HCl, 96% H2SO4, NaOH solid, and distilled water.
• 🧫 A solution is defined as a homogeneous mixture of two or more substances.
• 📏 The concentration of a solution refers to the amount of solute in a given volume of solvent, and it can be expressed in molarity, molality, percent, PPM, etc.
• ⚗️ The first solution prepared is sulfuric acid (H2SO4). The steps include measuring an empty flask, filling it partially with water, adding H2SO4, and then diluting it to the mark.
• 🧪 The second solution is sodium hydroxide (NaOH). The solid NaOH is dissolved in a beaker with water, stirred, and transferred to a volumetric flask, which is then diluted to the mark with water.
• ⚗️ The third solution prepared is hydrochloric acid (HCl), where concentrated HCl is diluted with distilled water in a volumetric flask using a pipette to measure the volume.
• 🧪 Each solution is thoroughly mixed to ensure homogeneity by shaking the flask after dilution.
• 👋 The experiment concludes with a message that the procedure should be useful and understandable, and viewers are invited to the next experiment.

Q & A

What is the main objective of the experiment in the video?

The objective of the experiment is to help students understand the solubility properties of a compound and how to prepare solutions with specific concentrations.

What are the tools and materials used in the experiment?

The tools and materials include a 50 mL volumetric flask, analytical balance, 50 mL beaker, stirring rod, volumetric pipette, 1 M HCl solution, 96% H2SO4, NaOH solid, and distilled water.

How is a solution defined according to the video?

A solution is defined as a homogeneous mixture of two or more substances.

What are the different ways to express the concentration of a solution?

The concentration of a solution can be expressed in percentage, molarity, molality, and parts per million (PPM), among others.

What is the first solution prepared in the experiment and how is it made?

The first solution prepared is H2SO4. The process involves filling a 50 mL volumetric flask with 3/4 of distilled water, adding concentrated H2SO4, and then diluting it to the calibration mark. The solution is then mixed by shaking.

How is the NaOH solution prepared in the experiment?

The NaOH solution is prepared by weighing NaOH solid, dissolving it in a beaker with water gradually while stirring, and then transferring the solution to a 50 mL volumetric flask. The beaker is rinsed with water, and more water is added to the flask until it reaches the calibration mark, followed by mixing.

What is the third solution prepared in the experiment and what are the steps?

The third solution is HCl. The steps include using a volumetric pipette to measure the concentrated HCl solution, transferring it to a 50 mL volumetric flask, adding distilled water to the mark, and then mixing it by shaking.

What is the purpose of shaking or homogenizing the solutions after adding water?

Shaking or homogenizing ensures that the solute is evenly distributed throughout the solvent, creating a uniform solution.

Why is it important to use an analytical balance in this experiment?

An analytical balance is used to accurately measure the mass of substances like NaOH and H2SO4, which is critical for preparing solutions with precise concentrations.

What is the significance of using distilled water in the preparation of solutions?

Distilled water is free from impurities and ions, which ensures that the solution's concentration is not affected by unwanted substances.