Question

CaCO3(s)+2NaOH(aq)=Na2Co3(aq)+Ca(OH)2(aq) which of the following is a type of about reaction

Answer 1

It should be:

Ca(OH)2(aq) + Na2CO3(aq) = CaCO3(s) + 2 NaOH(aq)

It is a Double Displacement Reaction.

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Answer 2

CaCO3(s)+2NaOH(aq)=Na2Co3(aq)+Ca(OH)2(aq). This type of reaction is also called the double displacement reaction.

It is a type of reaction where a compound formed by two elements are replaced by two elements of another compound or simply the position of the elements of those two compounds are exchanged.

Let me show U by an example. Suppose there are two compounds AB and XY. They react with each other to form AX and BY.

AB + XY》 AX + BY

Here B and X exchanges their places.

Hope this helps.