Sodium carbonate (na2co3) is formed from the reaction between

The question is incomplete, here is the complete question:

Sodium carbonate is formed from the reaction between

A: a weak acid and a strong base

B: a strong acid and a strong base

C: a strong acid and a weak base

D: a weak acid and a weak base

The given salt is formed from the reaction between a weak acid and strong base.

Explanation:

Salts are formed when an acid reacts with a base during a neutralization reaction.

is a salt which is formed by the combination of . Carbonic acid is a weak acid and sodium hydroxide is a strong base. So, the given salt is a basic salt.

Hence, the given salt is formed from the reaction between a weak acid and strong base.

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explanation:

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  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-