# Question #5d96e

##### 1 Answer

Molarity:

#### Explanation:

The molarity of a solution is defined as the number of moles of solute divided by the number of liters of solution.

#color(blue)(C = n/V)#

This means that in order to find a solution's molarity, you need to know two things

*the number of moles of solute*;*the volume of the solution*

You know that the volume of the solution is exactly **one liter**, so you only need to work out how many moles of

To do that, you need to use potassium hydrogen phthalate's **molar mass**, which will tell you what the mass of **one mole** of

If you look up this value, you will get that potassium hydrogen phthalate has a molar mass of **204.22 g/mol**. This means that *every mole* of potassium hydrogen phthalate has a mass of **204.22 g**.

You have a much smaller mass available, so will of course get less than one mole of

#1.43color(red)(cancel(color(black)("g"))) * "1 mole KHP"/(204.22color(red)(cancel(color(black)("g")))) = "0.0834 moles KHP"#

This means that the molarity of the solution will be

#C = n/V#

#C = "0.0834 moles"/"1 L" = color(green)("0.0834 M")#

If you take into account the number of sig figs you gave for the volume of the solution, the answer should be rounded to one sig fig

#C = "0.08 M"#