PREPARATION OF SOLUTION

Question 1

Solid sample – to prepare a solution from a solid sample

First,

Answer 1

weigh the needed amount
of solute

Question 2

Solid sample – to prepare a solution from a solid sample

Second,

Answer 2

dissolve in a given amount of solvent

Question 3

Solid sample – to prepare a solution from a solid sample

Third,

Answer 3

dilute to the mark

Question 4

To dilute to the mark:

Answer 4

You may invert the flask three times to distribute the components.

Question 5

Dilute the mark means

Answer 5

Add enough solvent until the
liquid reaches the etched mark

Question 6

Liquid sample - to prepare a solution from a liquid sample

First,

Answer 6

pipet the amount needed

Question 7

Liquid sample - to prepare a solution from a liquid sample

Second,

Answer 7

transfer to a volumetric flask containing a solvent

Question 8

Liquid sample - to prepare a solution from a liquid sample

Third,

Answer 8

dilute to the mark

Question 9

The phrase, n-fold dilution

Answer 9

decrease in the concentration of the stock
solution by a factor of n

C dilute = C conc / n