# What is the molarity of 2 mol of #KI# dissolved in 1 L water?

##### 1 Answer

#### Explanation:

**Molarity** is simply a measure of concentration.

For a given solution, molarity is calculated by taking into account how many **moles of solute** you get **per liter of solution**.

#color(blue)(|bar(ul(color(white)(a/a)"molarity" = "moles of solute"/"liters of solution"color(white)(a/a)|)))#

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

thenumber of moles of solutethetotal volume of the solutionexpressed inliters

In your case, you know that the solution has a volume of **one liter** of solution, the number of moles of solute present in this solution will essentially be equivalent to its molarity.

So, if you have **moles** of potassium iodide,

#color(blue)(|bar(ul(color(white)(a/a)c = n_"solute"/V_"solution"color(white)(a/a)|)))#

This is equivalent to

#c_(KI) = "2 moles"/"1 L" = color(green)(|bar(ul(color(white)(a/a)"2 mol L"^(-1)color(white)(a/a)|)))#

So keep in mind that every time you're looking for a solution's molarity, you are essentially looking for how many moles of solute you get in **one liter** of solution.