pH values of substances A,B,C,D were observed as 5,1,11,7 respectively when experimented with universal indicator ,in these.. I) which is strong acid? ii) which is strong base? iii) which is neutral solution? iv) which is weak acid?
Answers
Answer:
pH values of substances A,B,C,D were observed as 5,1,11,7 respectively when experimented with universal indicator ,in these.. I) which is strong acid? ii) which is strong base? iii) which is neutral solution? iv) which is weak acid?
Answer:
i) B is strong acid give dark red colour on the indicator.
ii) C is strong base give purple colour on indicator.
iii) D this may be water give green colour on indicator.
iv) A is weak acid.
Explanation:
Substances having ph less than 7 are acids and those have more than 7 are bases. The value on ph scale is
inversely proportional to hydrogen ions concentration which is responsible for the acidic behavior of a substance and directly proportional to hydroxide OH ions concentration which is responsible for basic nature of a substance.