Potassium fluoride is used for frosting glass. calculate the molarity of a solution prepared by dissolving 78.6 g of kf in enough water to produce 225 ml of solution.

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. We calculate as follows:

Molarity = 78.6 g KF ( 1 mol / 58.1 g ) / .225 L = 6.013 mol / L KF solution

Answer Link

Omm2 Omm2 · Answer 2 · 2022-03-31T12:53:25+02:00

So, the required molarity of the solution is [tex]6.01M[/tex].

To understand the calculations, check below.

Molarity:

Molarity (M) also known as Molar Concentration is a technique that is used to calculate the concentration of a solute that is present in a definite volume of solution. The solute is expressed in the unit of moles, whereas the solution is expressed in the form of liters. Molarity, denoted by the letter M is therefore defined as the number of moles of a solute present in one liter of a solution, that is moles per liters of a solution.

That is, [tex]Molarity=\frac{ moles }{volume}[/tex]

Given that,

Mass of KF = 78.6 g

Moles of KF = mass / molar=[tex]\frac{78.6}{58.09}=1.353 mol[/tex]

volume = 225 ml = 0.225 L

Now, using the above formula we calculate the required Molarity as,

[tex]Molarity=\frac{ moles }{volume} \\=\frac{1.353 }{0.225} \\Molarity=6.01 M[/tex]

Learn more about the topic of Molarity:

https://brainly.com/question/14514656