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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. Na_2CO_3 D. NaHCO_3
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. In this context:
- A. Na: This is sodium, which is not a base.
- B. NaOH: Sodium hydroxide readily dissociates in water to produce Na⁺ and OH⁻ ions, making it an Arrhenius base.
- C. Na_2CO_3: Sodium carbonate can act as a base but does not directly produce hydroxide ions in the way that an Arrhenius base does.
- D. NaHCO_3: Sodium bicarbonate can also act as a mild base but primarily generates bicarbonate ions when dissolved in water.
Thus, the correct answer is B. NaOH.