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Sodium carbonate (Na2CO3) is derived from a strong base (NaOH) and a weak acid (H2CO3). When dissolved in water, it results in a solution with a high pH (greater than 7). Which of the following describes this combination?

1. A strong base paired with a weak acid
2. A weak base paired with a strong acid
3. A strong acid paired with a strong base
4. None of the above

Correct answer: A strong base paired with a weak acid

Solution

Na2CO3 is a salt formed from a strong base (NaOH) and a weak acid (H2CO3). Upon hydrolysis, it produces OH⁻ ions, making the solution basic with pH > 7.

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