Question

Which of the following reactions shows a chemical change producing a solid?
2CH₂OH()+30₂(g) → 200₂(g) + 4H₂O(1) 2AgNO3(aq) + CaBr₂(aq) → 2AgBr(s) + Ca(NO3)2(aq) H₂(g) + O₂(g) → H₂O(l) NaCl(s) → NaCl(aq)

Answer 1

The chemical change producing a solid would be $2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)$

What are precipitation reactions?

They are reactions involving two soluble salts with one of the products being an insoluble salt.

In the reaction below: $2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)$

$AgNO_3$ and $CaBr_2$ are soluble salts while $AgBr$ produced is an insoluble salt. The insoluble salt is a solid.

More on precipitation reactions can be found here: https://brainly.com/question/24158764

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