[skaimomo]

Hello! My teacher asked us to observe various chemical reactions and predict their products but there is one reaction that I cannot comprehend which is CaCl2 + Na2CO3 + NaOH. I cannot find any previous experiments about that reaction so I cannot observe it. But on youtube, I saw an experiment on CaCl2 + Na2CO3 + HCl. What happened in that experiment was that when HCl was poured into the solution, the formed solid precipitate was dissolved. What would happen if instead of HCl, it was NaOH?

[Borek]

What was the solid? What was the reaction behind its dissolution in acid?

[skaimomo]

What was the solid? What was the reaction behind its dissolution in acid?

The solid precipitate was calcium carbonate

[Lars Fred riksson]

I don't think anything should happen at all.

Besides, commercial CaCl2 tend to be somwehat basic due to impurities (CaO?).

[Borek]

Hint: metathesis.