EXERCISE 22 A 

 DO LIQUIDS DIFFUSE? 



Materials. A tall, narrow glass cylinder or jar ; litmus solution ; a long glass funnel tube ; 

 sulphuric acid. 



Directions. Fill the glass cylinder or jar with water colored blue with litmus, to which a drop 

 of ammonia has been added. Insert a long glass funnel tube, and pour into it two or three drops of 

 sulphuric acid. Allow the jar to stand undisturbed with the funnel in position for a few days. Since 

 the acid is nearly twice as heavy as water it will soon find its way to the bottom of the jar. The 

 acid turns blue litmus to a red color. Note whether there is any indication that the heavier acid goes 

 up through the water. 



In case acid and litmus are not at hand, fill the jar with clear water and drop into it several 

 crystals of blue vitriol. A heavy blue solution will be formed at the bottom. Observe as above. 

 This should be set up a week or more before you are ready to draw conclusions. 



Additional problem. If sugar is placed in coffee or tea and the liquid is not stirred will the sugar 

 sweeten it ? Why ? 



[28] 



