EXERCISE 5 



Using small pieces of litmus paper, test many different articles at home and fill out following table 



NAMES OF SUBSTANCES THAT ACTED ON LITMUS PAPER 

 JUST AS DID THE ACID IN THE PREVIOUS EXPERIMENT: 



NAMES OF SUBSTANCES THAT ACTED ON LITMUS PAPER 

 AS DID THE SODIUM CARBONATE: 



ACID SUBSTANCES 



ALKALINE SUBSTANCES 



Questions. What use might be made of an acid-alkali indicator by (a) a doctor ? (b) a nurse ? 

 (c] a housekeeper ? 



[5] 



