A student has a solution with a pH of 7. The student adds HF, hydrogen floride, to the solution, hoping to increases the pH of the solution. What is wrong with this student’s approach?

You cannot change the pH of a solution.

HF is an acid, so it will lower the pH of the solution.

The pH of the solution is already as high as possible.

The pH is 7, so the solution is already as acidic as possible

Question

A student has a solution with a pH of 7. The student adds HF, hydrogen floride, to the solution, hoping to increases the pH of the solution. What is wrong with this student’s approach?

 You cannot change the pH of a solution. 

 HF is an acid, so it will lower the pH of the solution. 

 The pH of the solution is already as high as possible. 

 The pH is 7, so the solution is already as acidic as possible

goformit100 · Answer

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goformit100 · Answer

@Callisto

anonymous · Answer

More acid -> lower pH.

anonymous · Answer

pH is the negative logarithm of the hydronium ion concentration, so as the concentration of acid increases, the exponent becomes less negative, i.e. the absolute value of the exponent gets smaller.