Calculate the volume of 14.3 M HCl that must be used to prepare 100.0 L of a solution with a pH

step 1 In answering this question, we have to recall that pH is defined as negative low concentration o

Calculate the volume of 14.3 M HCl that must be used to...

Key Concepts

Strong Acid

A strong acid, like HCl, dissociates completely in aqueous solutions, meaning that every mole of the acid produces an equivalent mole of hydrogen ions. This complete dissociation simplifies calculations, as the molarity of the strong acid directly corresponds to the concentration of hydrogen ions, which is crucial when linking pH values to solution concentrations.

Dilution Principle

The dilution principle relies on the conservation of moles, as expressed by the equation M?V? = M?V?, where M? and V? are the molarity and volume of the concentrated solution, and M? and V? are those of the diluted solution. This concept is used to determine how much of a concentrated stock solution is needed to prepare a solution of a desired concentration and volume.

The pH scale measures the acidity or basicity of a solution using a logarithmic scale, defined as pH = -log[H?]. This relationship means that each unit change in pH corresponds to a tenfold change in the hydrogen ion concentration, which is essential for determining and adjusting the acid strength in the solution.

Molarity

Molarity is a unit of concentration that quantifies the number of moles of a solute per liter of solution. It is fundamental for preparing solutions and performing quantitative calculations in chemistry, such as converting between the volume of a concentrated solution and the amount of solute required for a diluted solution.

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