A forgetful scientist took three equal samples of water and added 2 ml of soap solution to each of them. He measured the height of the lather formed in each case. His results were 2 cm; 3 cm and 4 cm. Fill in his results correctly in the table given. Which sample was the hardest? Which is the softest? Can you explain the difference in the results between tap water and boiled water?
Water Sample |
Height of Lather |
distilled water |
|
tap water |
|
boiled tap water |
|