Answer:
[tex]n_{Cl^-}=25molCl^-[/tex]
Explanation:
Hello,
In this case, since the given 5-M concentration of magnesium chloride is expressed as:
[tex]5\frac{molMgCl_2}{L}[/tex]
We can notice that one mole of salt contains two moles of chloride ions as the subscript of chlorine is two, in such a way, with the volume of solution we obtain the moles of chloride ions as shown below:
[tex]n_{Cl^-}=5\frac{molMgCl_2}{L}*\frac{2molCl^-}{1molMgCl_2} *2.5L\\\\n_{Cl^-}=25molCl^-[/tex]
Best regards.
