Preparing solutions

Question 1

_________ is the most common activity in any analytical laboratory

Answer 1

Preparing a solution of known concentration

Question 2

The method for measuring out the solute and the solvent depends on the desired ______ and how exact the solution’s _______ needs to be known

Answer 2

concentration

Question 3

______ and ________ are used when we need to know a solution’s exact concentration

Answer 3

Pipets, volumetric flasks

Question 4

________, ______, and/or ____ suffice when a concentration need only be approximate

Answer 4

• Graduated cylinders
• beakers
• reagent bottles

Question 5

A _______ is prepared by weighing out an appropriate portion of a pure solid or by measuring out an appropriate volume of a pure liquid, placing it in a suitable flask, and diluting it to a known volume

Answer 5

stock solution

Question 6

Formula to get molarity (M)

Answer 6

Mass of solute (n)/volume of solution (L)

Question 7

A _______ is transferred to a new container and brought to a new volume

Answer 7

known volume of the stock solution

Question 8

Two methods of preparing solutions

Answer 8

• stock solution
• by dilution

Question 9

Formula for dilution

Answer 9

Co×Vo=Cd×Vd

Question 10

9 materials used in the experiment

Answer 10

• 250 mL Volumetric flasks
• stirring rod
• graduated cylinder
• pipette
• beaker
• CuSO4
• 2M HCl
• analytical balance
• parafilm wax

Question 11

Two sections of the experiment

Answer 11

• preparing a stock solution
• preparing a solution by dilution

Question 12

What reagent is used in Section A of the experiment?

Answer 12

(0.20 M) CuSO4

Question 13

What reagent is used in the Section B of the experiment?

Answer 13

(2 M) HCl