Question

What happens to the pH when an acid is added to an acidic solution?

Answer 1

jab kisi padarth ka pH value 7 se kam hota hai to tab pH prakriti acidic( amliya) hoti hai.
hope its help

Answer 2

decreases
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when an acid is added to an acidic solution the pH decreases as the acidic character will increase and also the concentration of H+ ion increases in the given solution

Lower the pH value stronger is the acid