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tanvira12
the lower the pH level, the higher the concentration of the acid
There's something called a pH scale, in which scientists/chemists use to measure the pH of a substance. Also to determine whether it's an acid or a base. 

1 to 14

1 - 6 = acid
8 - 14 = base

1 is very acid, and 6 would be less acidic. 

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