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Which of the following is an Arrhenius base? A - HSC - SSCE Chemistry - Question 2 - 2019 - Paper 1
Question 2
Which of the following is an Arrhenius base? A. Na B. NaOH C. Na₂CO₃ D. NaHCO₃
Worked Solution & Example Answer:Which of the following is an Arrhenius base? A - HSC - SSCE Chemistry - Question 2 - 2019 - Paper 1
Step 1
Identify the Arrhenius base
Answer
An Arrhenius base is defined as a substance that increases the concentration of hydroxide ions (OH⁻) in aqueous solution.
Among the options provided:
- Na (sodium) does not produce hydroxide ions in solution.
- NaOH (sodium hydroxide) dissociates in water to produce Na⁺ and OH⁻ ions, making it an Arrhenius base.
- Na₂CO₃ (sodium carbonate) does not directly furnish hydroxide ions but reacts with water to produce them, so it can be considered a base, but it is not a classic Arrhenius base.
- NaHCO₃ (sodium bicarbonate) can act as a weak base but doesn’t directly produce OH⁻ in significant amounts.
Therefore, the correct answer is B. NaOH.