17. pH value of a solution changes from 3.5 to 7 after addition of a chemical X.
a) What has been added to the solution (NaOH or HCl)?
b) Why pH changed from 3.5 to 7?
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Answer:
a) NaOH has been added.
b)NaOh is a basic substance which is basic in nature so 7pH is a base pH.
Explanation:
Hope u understand
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