pH scale is a measure which helps us to compare the strength of various acids and alkalis.
How would you describe a substance of pH of 3 ?
Strong acid
Weak acid
Strong alkali
Weak alkali
A ph of 3 would be a strong acid because the lower the ph the more acidic it is. However a strong acid would be a ph from about 0 to 3 and a weak acid about 5-7.
