Question

molecules that do not produce ions in solutions

Answer 1

Molecules of non polar covalent compounds do not produce ions in solutions...

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Answer 2

solution is a special type of mixture that is homogeneous throughout. This means that the molecules or ions involved are so well mixed that the composition is uniform throughout the mixture. Think of salt-water. You cannot see salt within the water when it is fully dissolved, not even with the aid of a microscope. (This contrasts with a heterogeneous mixture in which you can identify the separate components. For example, a mixture of salt and sand is heterogeneous.)