Volumetric flask

Question 1

What method is used to calculate the exact mass of Na2CO3?

Answer 1

Weighing by difference method.

Question 2

How much anhydrous sodium carbonate is used in the experiment?

Answer 2

2.6g.

Question 3

What is the first step in the volumetric flask experiment?

Answer 3

Put 2.6g of anhydrous sodium carbonate into a weighing boat and weigh using a balance.

Question 4

What should be done after weighing the sodium carbonate?

Answer 4

Transfer the sodium carbonate to a 100cm3 beaker and reweigh the weighing boat.

Question 5

How do you dissolve the sodium carbonate?

Answer 5

Use distilled water and a stirring rod to stir and dissolve the sodium carbonate.

Question 6

What is the purpose of the funnel in the experiment?

Answer 6

To transfer the solution to a 250cm3 volumetric flask.

Question 7

How should the beaker and stirring rod be cleaned?

Answer 7

Use distilled water to wash the beaker and the stirring rod and transfer the washings to the volumetric flask.

Question 8

How do you complete the solution in the volumetric flask?

Answer 8

Use distilled water to make up the solution until the meniscus lies at the 250cm3 line.

Question 9

What should be done after preparing the solution?

Answer 9

Label the solution with the correct concentration of sodium carbonate.