Explain the following statement: a concentrated acid is not necessarily a strong acid.

Concentration involves the relative amounts of solvent and solute in a solution, when strength is related to the extent to which a substance dissociates :))
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Well, we know that a concentrated acid has a high concentration (obviously). And a strong acid is where the solute is completely dissolved into the solvent. That means that not all concentrated acids are strong acids. 

The answer is b.the gaseous state is electrically positive, while the plasma state is electrically negative. 

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