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I noticed when we did pH computations, we used the concentration of specific ions or molecules. When we did this, we used M, which is the unit for molarity of moles/liters. However, I always understood concentration as g/L of Kg/L. What is the difference between molarity and concentration? Is there a reason why we are using molarity in these calculations?
In chemistry, you will most often use molarity M as the units for concentration. (moles/L)
Yes, there is a difference between concentration and molarity. As you indicated with "concentration as g/L of Kg/L," concentration is the ratio of the amount of solute per amount of solution. Meanwhile, molarity is a unit of concentration that relates the amount of moles of a solute per liter of solution.
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