Question

A solution contains 0.0000001 (10-7) moles of hydroxyl ions (OH-) per liter. Which of the following best describes this solution? A solution contains 0.0000001 (10-7) moles of hydroxyl ions (OH-) per liter. Which of the following best describes this solution? basic: H+ donor basic: H+ acceptor acidic: H+ acceptor neutral acidic: H+ donor

Answer 1

Answer: neutral

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

$pH=-\log [H^+]$

$pOH=-\log[OH^-]$

Putting in the values:

$pOH=-\log[10^{-7}]$

$pOH=7$

$pH+pOH=14$

$pH=14-7=7$

Thus as pH is equal to 7, the solution is neutral and nether accepts $H^+$ nor donates $H^+$.