Give a acid-base pairs which produce Na2CO3 as a salt

H2CO3 = carbonic acid

NaOH = sodium hydroxide

H2CO3 + 2NaOH ==> Na2CO3 + 2H2O

To find acid-base pairs that can produce Na2CO3 as a salt, we need to look for acids that can donate a proton (H+) and bases that can accept a proton. Na2CO3, also known as sodium carbonate, is a basic salt that forms when a strong base reacts with a weak acid.

One possible acid-base pair that can produce Na2CO3 is:

Acid: H2CO3 (carbonic acid)
Base: 2 NaOH (sodium hydroxide)

The reaction between carbonic acid (H2CO3) and sodium hydroxide (NaOH) can be represented as follows:

H2CO3 + 2 NaOH → Na2CO3 + 2 H2O

In this reaction, the acid (H2CO3) donates two protons (H+) to the base (NaOH), forming water (H2O) and sodium carbonate (Na2CO3) as the salt.

It's important to note that there can be other possible acid-base pairs that can also produce Na2CO3 as a salt, depending on the specific reactants used.