finding the pH of the following samples by using pH paper a) dilute hydrochloric acid b) dilute NaOH solution c) dilute ethanoic acid solution d) lemon juice e) water f) dilute hydrogen carbonate solution
Answers
a) dilute hydrochloric acid : colour of pH paper becomes red in the solution of dilute hydrochloric acid. pH of solution approximately equal to 1. as red colour shows solution contains strong acid.
b) dilute NaOH solution : colour of pH paper becomes purple in the NaOH solution, it happens because NaOH is one of the strongest base. and we know, pH of strong base approximately equal to 14.
c) dilute ethanoic acid : colour of pH paper becomes yellow in the solution of ethanoic acid. means weak acid. and pH value is indicated by pH paper nearest value of 3.
d)lemon juice : colour of pH paper becomes orange in the lemon juice. so pH value will be 2. as solution is moderate acidic.
e)water : colour of pH paper becomes green. it means water is neutral in nature. so, pH value of water is 7.
f)dilute hydrogen carbonate : colour of pH paper becomes blue in the solution of dilute hydrogen carbonate. it means solution is weak alkaline (base) in nature. and pH value of solution is 9.
Answer:
Refer to the attachment
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