Q2) The pka of carbonic acid is 6.37. At which ranges of pH carbonic acid can work as a good buffer?
H2CO3 HCO3- + H+​

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

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