Explanation:
The dissociation constant of the water is given as :
The value of st 25°C =
Water is neutral in nature with equal amount of hydronium and hydroxide ions.
The pH of the water at 25°C is 7.
With increase in temperature dissociation of water will increase with which concentration of hydronium and hydroxide ions will also increase which will in return will lower the down the pH of the water at higher temperature.
The correct answer for the question that is being presented above is this one: "The pH of the solution containing NaF and HF would be lower than that of a solution of HF only.; <span>THe pH of the solution containing NaF and HF would be higher than that of a solution of HF only."</span>
Your answer is, an acid
<u>Acid</u>
An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted. Now there are more hydrogen ions than hydroxide ions in the solution.
<u>Acid Rain</u>
Acid rain is rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions. Most water, including drinking water, has a neutral pH that exists between 6.5-8.5, but acid rain has a pH level lower than this and ranges from 4-5 on average.
<u>Examples of Acids</u>
Thus, <u>an acid</u> is your answer.
Learn more about "Acid" here https://brainly.in/question/9771168
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