What is the molarity of a phosphoric acid solution if the solution is 85% by mass H3PO4 and has a...

Question:

What is the molarity of a phosphoric acid solution if the solution is 85% by mass {eq}H_3PO_4 {/eq} and has a density of 1.7 g/mL?

Solution Concentrations:

The moles of solute present in any solution can be expressed by the concentration units of molarity and molality. The molarity and molality are concentration units that are commonly used. Both are by moles of solute. However, we can also express the amount in moles of solute by using the mole fraction. These solution concentration units can be determined by using the equation below.

{eq}\rm Molarity = \dfrac{moles~solute}{liters~solution} \\ molality = \dfrac{moles~solute}{kg~solvent} \\ mole~fraction = \dfrac{moles~component}{total~moles~of~solution} {/eq}

Answer and Explanation: 1

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A useful trick is to assume that we have 100 grams of solution. This allows us to assume that we have 85 grams of phosphoric acid. The following...

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Concentration of Solutions: Definition & Levels

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Chapter 13 / Lesson 2
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Learn the dilute and concentrated solution definition. Compare and contrast dilute vs concentrated solution examples and see how a solution changes physically and chemically as it goes from dilute to concentrate.


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