Praktikum Titrasi Asam Kuat Basa Kuat | HCl dengan NaOH

Summary

This video demonstrates the practical process of performing a titration between a strong acid (HCl) and a strong base (NaOH). It begins with an introduction of the equipment and materials, such as a burette, pipette, Erlenmeyer flask, and phenolphthalein indicator. The video details key steps, including rinsing apparatus, assembling the setup, and preparing solutions. The titration process is explained, highlighting careful volume measurements, color change observation at the titration's endpoint (a pale pink hue), and recording data. This step-by-step guide aids in understanding the practical execution of acid-base titration.

Takeaways

• 🧪 The experiment is about titration of a strong acid (HCl) with a strong base (NaOH).
• 🔧 The equipment used includes a clamp, stand, burette (50 ml), pipet (10 ml), funnel, Erlenmeyer flask (100 ml), and beakers (100 ml).
• 💧 The chemicals involved are distilled water (aquades), phenolphthalein indicator, 0.1 M hydrochloric acid (HCl), and 0.1 M sodium hydroxide (NaOH).
• 🧴 Before use, volumetric equipment (such as the burette and pipet) must be rinsed with the respective solutions.
• ⚖️ The burette is filled with 50 ml of 0.1 M NaOH, ensuring the meniscus is at the proper scale for accurate measurement.
• 📏 The pipet is rinsed with 0.1 M HCl before transferring 10 ml of HCl solution into the Erlenmeyer flask for the titration.
• 🎨 Two drops of phenolphthalein are added to the HCl in the flask to act as the indicator for the titration.
• 🔍 The titration process involves slowly adding NaOH from the burette to the HCl solution in the Erlenmeyer flask while stirring.
• 🌸 The endpoint of the titration is reached when the solution turns a faint pink color, indicating neutralization.
• 📝 Data collection involves recording the volume of NaOH used to reach the endpoint, repeating the experiment for accuracy.

Q & A

What is the objective of the experiment presented in the script?

The objective of the experiment is to perform a titration between a strong acid (hydrochloric acid) and a strong base (sodium hydroxide).

What are the main materials and tools needed for the titration process?

The materials and tools required include a clamp, a stand, a 50 mL buret, a 10 mL pipette, a short glass funnel, three 100 mL Erlenmeyer flasks, two 100 mL beakers, distilled water, phenolphthalein indicator, 0.1 M hydrochloric acid solution, 0.1 M sodium hydroxide solution, and white paper as a base.

Why is it important to rinse the buret before the titration begins?

Rinsing the buret ensures that it is clean and that no residual substances will affect the accuracy of the titration results. In this experiment, the buret is rinsed with 0.1 M sodium hydroxide solution.

How should the buret be filled with sodium hydroxide solution?

The buret should be filled with 0.1 M sodium hydroxide solution using a glass funnel. Ensure the buret tap is closed to prevent leakage, and fill the buret to 50 mL, adjusting the volume to the meniscus level for accuracy.

What is the purpose of the phenolphthalein indicator in this titration?

Phenolphthalein is used as an indicator to detect the endpoint of the titration. It changes color to pink when the solution turns from acidic to slightly basic, indicating the completion of the titration.

Why is it necessary to place white paper under the Erlenmeyer flask during titration?

White paper is placed under the Erlenmeyer flask to make it easier to observe the color change, which signals the endpoint of the titration.

How is the titration performed once the materials are set up?

The titration is performed by gradually adding 0.1 M sodium hydroxide from the buret into the hydrochloric acid in the Erlenmeyer flask, while gently swirling the flask, until the solution turns pale pink.

What does the endpoint of the titration indicate?

The endpoint is indicated by a slight pink color that persists in the solution, showing that the hydrochloric acid has been neutralized by the sodium hydroxide.

How is the volume of sodium hydroxide used in the titration measured?

The volume of sodium hydroxide is measured by reading the scale on the buret before and after titration, and the difference gives the volume of sodium hydroxide used.

What is the next step after completing the titration process?

After completing the titration, the volume of sodium hydroxide used is recorded for analysis, and the process is typically repeated for accuracy.