Week 5 - Dilutions

Question 1

What does it mean to dilute a solution

Answer 1

It means that we reduce the concentration of all the ingredients in the solution by adding solvent, in most cases water .

Question 2

What is a stock solution

Answer 2

A highly concentrated solution. It is usually used for transport and storage

eg. oros concentrate; sunglight liqid soap; bleach; tomato paste

Question 3

What is a working solution

Answer 3

• Has all ingredients at the precise concentrations needed for the respective experiment.
• It is prepared by diluting the stock solution

Question 4

What does a stock solution imply

Answer 4

WThe concentration of all ingredients in the solution is increased by the same factor as compared to their respective
working concentrations

Question 5

What does a working solution imply

Answer 5

• solution is at working concentration, when all ingredients of the solution are at the concentration as intended for work. The solution can be used as is