Question

How many moles are required to produce 250 mL of a 0.46 M solution?Given:Find:Equation Used:Answer:

Answer 1

Step 1 - Understanding the definition of molar concentration

Molar concentration (M or mol/L) is defined as the quotient between the number of moles (n) and the total volume of the solution (V):

`M=(n)/(V)`

Therefore, if the volume of the solution and its final concentration are known, we can use the equation to find the required number of moles.

Step 2 - Finding the required number of moles

The solution's concentration is 0.46 M and its volume is 250 ml. The volume must always be used in L, so:

`\begin{gathered} M=(n)/(V)\to n=M* V \\ n=0.46*0.250=0.115\text{ moles} \end{gathered}`

Therefore, 0.115 moles would be required.