16 flashcards · Shared on 19 August 2026 by AtomAI Library
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Which pH value represents an acidic aqueous solution at 25 °C?
3
Which pH value represents an acidic aqueous solution at 25 °C?
3
When the Brønsted–Lowry acid HCl donates a proton, which conjugate base forms?
Cl−
According to the Brønsted–Lowry model, a base is a substance that:
Accepts a proton
At 25 °C, what is the pH of pure water?
7
At 25 °C, what relationship applies between pH and pOH in an aqueous solution?
pH + pOH = 14
Which statement best describes an alkaline solution?
It has more hydroxide ions than hydronium ions
What distinguishes a strong acid from a weak acid?
A strong acid ionizes essentially completely in water
What are the usual products when an acid reacts completely with a metal hydroxide base?
A salt and water
What is a conjugate acid–base pair?
Two species that differ by one proton
What is the hydronium ion concentration in a solution with pH 4?
1 × 10−4 mol L−1
What is an Arrhenius acid?
A substance that produces hydrogen ions in aqueous solution
Which expression defines the pH of a solution?
pH = −log10[H3O+]
A solution changes from pH 5 to pH 4. How does its hydronium ion concentration change?
It increases by a factor of 10
Which statement correctly compares acid strength and concentration?
Strength describes ionization, while concentration describes the amount dissolved per volume
A 0.001 mol L−1 solution of a strong monoprotic acid is assumed to ionize completely. What is its approximate pH?
3
What is the role of an acid–base indicator?
To change color over a particular pH range