NCEA Level 2 Chemistry Practice Exam 2025 – Your All-in-One Study Guide for Success!

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In chemistry, what does the term "concentration" refer to?

The amount of solvent in a solution

The amount of solute present in a given volume of solvent or solution

The term "concentration" in chemistry specifically refers to the amount of solute that is present in a given volume of solvent or solution. This measurement is crucial in various chemical processes, as it dictates how much of the substance is available for reactions, influences the solution's properties, and determines the effectiveness of solutions in applications like pharmaceuticals, food science, and industrial practices.

For example, a concentrated solution of sodium chloride (table salt) means there is a large amount of sodium chloride dissolved in a specific volume of water, whereas a dilute solution would have less sodium chloride in the same volume. Concentration can be expressed in several ways, such as molarity (moles of solute per liter of solution), mass percent, or parts per million, highlighting the significance of the solute in the chemistry of solutions.

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The total volume of a solution

The temperature of a solution

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