On the pH scale, when acids are added to an aqueous solution, the pH should:

In aqueous solutions, what does pH measure?

On the pH scale at $25°C$, a solution with $\mathrm{pH}=7$ is best described as:

On the pH scale at $25°C$, the pH of a basic (alkaline) aqueous solution is typically:

On the pH scale, what does pH measure in an aqueous solution?

In aqueous solutions, what does the pH scale measure?

On the pH scale, a solution with $pH=2$ is best classified as which of the following?

Which statement correctly describes the relationship between pH and hydrogen ion concentration in aqueous solution?

On the pH scale, what is the typical (normal) pH range of healthy human skin?