A solution has a pH of 8. If it is diluted with an equal volume of water, what will happen to its pH?

When a solution is diluted with water, the concentration of hydroxide ions (OH-) decreases. The initial pH of 8 indicates a basic solution, meaning it has more OH- ions than H+ ions. Adding water reduces the concentration of OH- ions, thereby increasing the concentration of H+ ions relative to OH- ions. As a result, the pH decreases, making the solution less basic and close to neutrality. Dilution generally leads to a reduction in ion concentration, thereby affecting the pH.