Standard Solution Preparation Techniques

This video tutorial guides viewers through the process of making a standard solution. It covers the preparation of materials, transferring and mixing of powder with water, and ensuring accurate measurements. The tutorial emphasizes the importance of careful handling to achieve the correct concentration, using tools like a volumetric flask and pipette.

What is the main objective of the video tutorial?

• To demonstrate how to make a standard solution.

• To explain the history of chemistry.

• To discuss the properties of water.

• To show how to use a microscope.

What is the first step in preparing the standard solution?

• Boiling the water.

• Measuring and transferring the powder.

• Heating the solution.

• Adding acid to the solution.

Why is it important to wash the weigh boats?

• To ensure all powder is transferred to the beaker.

• To prevent contamination.

• To clean them for future use.

• To measure the weight of the boats.

How many times should the rinsing process be repeated to ensure all powder is transferred?

• At least once.

• At least twice.

• At least three times.

• At least four times.

What is the purpose of using a filter funnel during the process?

• To filter impurities.

• To help transfer the solution into the volumetric flask.

• To measure the pH of the solution.

• To cool down the solution.

What should be done if the solution needs more mixing after initial preparation?

• Add more water.

• Heat the solution.

• Invert the flask.

• Add more powder.

Why is it important to slow down when approaching the 500 ml mark?

• To ensure the correct concentration.

• To allow the solution to cool.

• To prevent the flask from breaking.

• To avoid spilling the solution.

What tool can be used to add liquid drop by drop?

• A measuring cup.

• A plastic pipette.

• A stirring rod.

• A thermometer.

What happens if you go over the 500 ml mark?

• The solution becomes too diluted.

• The solution becomes too concentrated.

• The solution evaporates.

• The solution remains unchanged.

Why can't liquid be removed if the 500 ml mark is exceeded?

• It will change the temperature.

• It will alter the concentration.

• It will cause the flask to break.

• It will make the solution unstable.