Question

How many moles of Csl must be dissolved into 800 ml of a 0.40 M
solution?

Answer 1

0.32 moles of Csl must be dissolved into 800 ml of a 0.40 M solution.

Step-by-step explanation:

Data given:

volume of the Csl solution = 800 ml or 0.8 litres

molarity of the solution = 0.40 M

number of moles of Csl = ?

molarity is calculated by using the formula:

molarity =
`(number of moles)/(volume in litres)`

rearranging the equation to get the number of moles:

number of moles = molarity x volume in litres

putting the values in the equation:

number of moles = 0.4 x 0.8

number of moles of Csl in the solution is 0.32

therefore 0.32 moles of Csl should be dissolved in 800 ml of the solution to obtain molarity of 0.4 M.