NURSING ANM AND GNM

Detailed explanation-1: -The correct answer is (b) 2. The pH scale is used to measure how acidic or basic a solution is.

Detailed explanation-2: -pOH=−log10(OH−) p O H = − l o g 10 ( O H − ) . 12=−log10(10−12) 12 = − l o g 10 ( 10 − 12 ) . So, if the pH is 2, then the hydrogen ion concentration is 10-2 M. Also, the pOH is 12, and the hydroxide ion concentration is 10-12 M.

Detailed explanation-3: -A basic solution has a pOH of less than 7, while an acidic solution has a pOH of greater than 7. The pOH is convenient to use when finding the hydroxide ion concentration from a solution with a known pH.