Question

What is the molarity of 2.4 moles KBr in 4 L solution?

Answer 1

`0.6 \ "M"`

Explanation:

We got `2.4 \ "mol"` of potassium bromide dissolved in `4 \ "L"` of the solution.

Molarity is expressed through the equation:

`"molarity"="moles of solute"/"liters of solution"`

So, plugging in values for the equation, we get:

`"molarity"=(2.4 \ "mol")/(4 \ "L")`

`=0.6 \ "mol/L"`

Another way of writing molarity is in `"M"`, and `1 \ "M"=1 \ "mol/L"`.

So, the molarity of this solution is `0.6 \ "M"`.

Answer 2

The defination of molarity gives us,

`molarity = "number of moles of solute"/"volume of solution in L"`

Put in the values from the question,

`M = (2.4 " moles of KBr") / (4L " of solution"`

`M = 0.6` mol/L