How many liters of 4 m solution can be made using 100 grams of lithium bromide?
Answers
HEY MATE HERE IS YOUR ANSWER:-
Explanation:
The first thing that you need to do here is to convert the mass of lithium bromide to moles by using the compound's molar mass.
100.0
g
⋅
1 mole LiBr
86.845
g
=
1.1515 moles LiBr
Now, the molarity of the solution is simply a measure of the number of moles of solute, which in your case is lithium bromide, present for every
1.00 L
of the solution.
In order to have a
4.00-M
solution of lithium bromide, you need to have
4.00
moles of lithium bromide for every
1.00 L
of this solution.
You know that your sample contains
1.1515
moles of lithium bromide, so you can use the molarity of the solution as a conversion factor to determine how many liters of this solution can be made.
1.1515
moles LiBr
⋅
1.00 L solution
4.00
moles LiBr
=
0.288 L solution
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