if hydrogen flouride (HF) is dissolved in pure water will the pH of the solution be lesser or greater than 7? please explain why? thank you so much ! please i need the answer tonight!!!!!
HF is an acid. the pH will be acidic, less than 7.
idl
To determine whether the pH of a solution will be less than or greater than 7 when hydrogen fluoride (HF) is dissolved in pure water, we need to consider the nature of HF and its interaction with water.
HF is a weak acid that can dissociate in water, producing hydrogen ions (H+) and fluoride ions (F-). The dissociation reaction can be written as follows:
HF (aq) ⇌ H+ (aq) + F- (aq)
Since HF is an acid, it will increase the concentration of hydrogen ions (H+) in the solution.
Now let's consider the pH scale. The pH scale is a measure of the acidity or alkalinity of a solution. It ranges from 0 to 14, with 7 considered neutral. A pH value less than 7 indicates acidity, while a pH value greater than 7 indicates alkalinity.
When HF dissolves in water, it increases the concentration of hydrogen ions (H+), which leads to a decrease in the pH of the solution. Therefore, the pH of the solution will be less than 7.
In summary, when HF is dissolved in pure water, the pH of the solution will be less than 7 due to the increased concentration of hydrogen ions resulting from the dissociation of HF.