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If a substance has a pH of 4, is it acidic or basic. What type of ion is it going to give off when
dissolved in water?
Solution
If a substance has a pH of 4, it is acidic in nature.
An acid donates hydrogen ions. So,when this acid is dissolved in water (H2O), the balance
between hydrogen ions and hydroxide ions is shifted. There will be more hydrogen ions rather
than hydroxide ions in the solution. This kind of solution is called acidic solution.
H2O -----------------> H+ + OH-
Note:
If,
pH < 7 = Acidic in nature
pH = 7 = Neutral solutions
pH > 7 = Basic / Alkaline in nature

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