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Strength of Acids and Bases

Chemistry ⇒ Acids, Bases, and Salts

Strength of Acids and Bases starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Strength of Acids and Bases. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A solution of 0.1 M NH3 has a higher pH than a 0.1 M NaOH solution. Explain why.
A student adds equal concentrations of HCl and CH3COOH to separate beakers of water. Which solution will have a lower pH?
Arrange the following acids in order of increasing strength: HCl, CH3COOH, H2SO4.
Calculate the pOH of a 0.01 M NaOH solution.
Define the term 'strong acid'.
Explain why acetic acid is considered a weak acid.
Explain why the electrical conductivity of a strong acid is higher than that of a weak acid at the same concentration.
If a 0.1 M solution of acid X has a pH of 1, is acid X strong or weak?
If the Kb of a base is very large, what does this indicate about the base's strength?
State the relationship between the strength of an acid and the strength of its conjugate base.
The Ka value of acetic acid is 1.8 × 10-5. Is acetic acid a strong or weak acid?
The pH of a 0.1 M solution of a weak acid is 3.5. Is the acid strong or weak?
A 0.1 M solution of a monoprotic acid has a pH of 2.7. Calculate the acid dissociation constant (Ka) for this acid. (Assume the acid is weak and neglect activity coefficients.)
A student prepares two solutions: 0.1 M NaOH and 0.1 M Ba(OH)2. Which solution will have a higher pH and why?
Arrange the following bases in order of increasing strength: NH3, KOH, Ca(OH)2, and Al(OH)3.
Explain why the pH of a 0.01 M solution of a strong acid is not always exactly 2.0, especially at very low concentrations.
Given that the Ka of formic acid (HCOOH) is 1.8 × 10-4 and the Ka of benzoic acid (C6H5COOH) is 6.3 × 10-5, which acid is stronger? Justify your answer with reference to their dissociation constants.