All the layers should be kept until the experiment is complete.
<h3>What is extraction?</h3>
In chemistry, solvent extraction is accomplished by adding a sample containing the substance to be separated into a system of two solvents, an aqueous layer and an organic layer.
It is important to note that all the layers should be kept until the experiment is complete. No layer ought to be discarded before the work is completed.
Learn more about solvent extraction:brainly.com/question/11041092
Precipitation occurs when the product of the ion concentration exceeds the Ksp.
The answer will be a or d im not really sure but the two of them will work
Zinc Oxide is the IUPAC name for ZnO
