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seang
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Hello, on one of my thermo problems, it says, "a molar concentration of .5 parts per million." what does this mean? .5 moles in a million?
A molar concentration, also known as molarity, is a measure of the concentration of a solution and is defined as the number of moles of a solute per liter of solution. This unit is commonly used in chemistry to express the amount of a substance dissolved in a given volume of a solvent.
The molar concentration of a solution can be calculated by dividing the number of moles of solute by the volume of the solution in liters. This can be represented by the formula M = n/V, where M is molarity, n is the number of moles of solute, and V is the volume of the solution in liters.
Molar concentration is a measure of the concentration of a solution in terms of moles per liter, while molality is a measure of the concentration in terms of moles per kilogram of solvent. Molarity takes into account the volume of the solution, while molality does not.
Molar concentration is often used in experiments to prepare solutions of known concentrations, to calculate the amount of a substance needed for a reaction, and to determine the rate of a reaction. It is also used in titrations to determine the concentration of an unknown solution.
Molar concentration is important in various real-life applications, such as in the pharmaceutical industry for drug formulations, in environmental studies for measuring pollutants in water, and in food industry for determining the concentration of additives. It also plays a crucial role in understanding chemical reactions and their rates in biological systems.