Standard Solution Preparation Techniques

The video tutorial demonstrates how to prepare a standard solution using sodium hydrogen carbonate. It covers the necessary equipment, accurate weighing of the salt, transferring it to a volumetric flask, and ensuring complete dissolution. The process includes careful rinsing of equipment and precise addition of water to reach the graduated line. The tutorial emphasizes labeling the flask with contents and concentration for lab safety.

Which piece of equipment is used to measure the mass of sodium hydrogen carbonate?

• Volumetric flask

• Electronic balance

• Funnel

• Spatula

What is the target mass of sodium hydrogen carbonate for the standard solution?

• 1.50 grams

• 2.40 grams

• 2.00 grams

• 3.00 grams

What should you do if there are clumps in the sodium hydrogen carbonate?

• Crush them into smooth grains

• Ignore them

• Add more water

• Leave them as they are

Why is it important to rinse the weighing tray and spatula?

• To remove any water

• To clean them for future use

• To make them shiny

• To ensure all salt is transferred to the flask

What is the purpose of shaking the volumetric flask after adding water?

• To remove air bubbles

• To make it look cloudy

• To cool down the solution

• To mix the solution thoroughly

How should water be added to the volumetric flask to reach the graduated line?

• Use a spoon

• Shake the flask while adding

• Add drop by drop

• Quickly pour it in

What should be done if the distilled water bottle's tip falls off?

• Use a different liquid

• Continue using it, but be careful

• Stop using the bottle

• Replace the bottle

What is the final step after preparing the standard solution?

• Heat the solution

• Pour the solution into another container

• Label the volumetric flask with details

• Store the solution in a dark place

Why is it important to label the volumetric flask?

• To ensure it is not used by others

• To prevent theft

• To identify the contents and concentration

• To make it look professional

What should be included on the label of the volumetric flask?

• The color of the solution

• The temperature of the solution

• The contents, concentration, and your name

• The date of preparation