Preparing a Standard Solution of Oxalic Acid

The video tutorial guides students on preparing a standard solution of oxalic acid for redox titration. It begins with an introduction to the objective, followed by a detailed explanation of the formula used to calculate the required weight of oxalic acid. The teacher demonstrates the process of weighing oxalic acid using a digital balance and discusses the importance of accuracy. The video then covers the steps to dissolve the oxalic acid in water, ensuring the solution is homogeneous. Finally, the teacher provides advice on transferring the solution to a beaker before use and concludes with encouraging words for the students.

What is the primary aim of the video tutorial?

• To measure the pH of oxalic acid

• To understand the properties of oxalic acid

• To prepare a standard solution of oxalic acid

• To learn about redox reactions

What is the molecular mass of oxalic acid?

• 200

• 100

• 126

• 150

Which formula is used to calculate the weight of oxalic acid needed?

• Weight = Molarity x Molecular Mass x Volume

• Weight = Molecular Mass / Molarity x Volume

• Weight = Molarity / Molecular Mass x Volume

• Weight = Molarity x Volume / Molecular Mass

What should the digital balance display before weighing?

• 1.00

• 0.00

• 0.10

• 2.00

What is the weight of the filter paper used in the video?

• 0.91 grams

• 1.22 grams

• 0.50 grams

• 1.00 grams

What is the target weight of oxalic acid plus filter paper?

• 1.22 grams

• 1.50 grams

• 0.91 grams

• 1.00 grams

What should be done after adding oxalic acid to the flask?

• Shake the flask to dissolve the acid

• Heat the solution

• Add a pH indicator

• Add more oxalic acid

What tool is suggested for the final addition of water to the flask?

• A spoon

• A measuring cup

• A funnel

• A pipette or dropper

Why should the solution be transferred to a beaker before use?

• To measure its pH

• To add more water

• To ensure it is homogeneous

• To cool it down

What is the final step before using the solution for titration?

• Add more oxalic acid

• Add a pH indicator

• Transfer it to a beaker

• Heat the solution