Multiple Choice
On the pH scale at , a solution with is best described as:
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17. Acid and Base Equilibrium
The pH Scale
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In aqueous solutions, what does the pH scale measure?
A
The temperature of the solution
B
The total dissolved salt concentration (salinity)
C
The hydrogen ion concentration, expressed as (i.e., based on in solution)
D
The hydroxide ion concentration only (a direct measure of )
Verified step by step guidance1
Understand that the pH scale is a measure used in aqueous solutions to indicate the acidity or basicity of the solution.
Recall that pH is defined based on the concentration of hydrogen ions (H\+), which are responsible for the acidic properties of the solution.
Use the formula for pH, which is given by \(pH = -\log([H^+])\), where \([H^+]\) is the molar concentration of hydrogen ions in the solution.
Recognize that a lower pH value corresponds to a higher concentration of hydrogen ions (more acidic), while a higher pH corresponds to a lower concentration of hydrogen ions (more basic or alkaline).
Note that pH does not directly measure temperature, total dissolved salts (salinity), or hydroxide ion concentration alone, but specifically the hydrogen ion concentration.
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