molarity of 3.6% solution of glucose (w/v) in water is?
chemistry question hai
Answers
ANSWER
Molarity is a measure of the concentration of a solute in a solution or of any chemical species, in terms of amount of a substance in a given volume. A commonly used unit for molar concentration used in chemistry is mol/L. A solution of concentration 1 mol/L is also denoted as 1 molar (1 M).
Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. For use in broader applications, it is defined as amount of solute per unit volume of solution, or per unit volume available for the species, represented by lowercase c:
c=
V
n
where,
n= no. of moles of solute.
V= volume of solution in liters.
Calculation:
Number of moles of glucose is n=
180
36
=0.2 moles
The volume of solution in liters is V=
1000
400
=0.4 litres
Molarity of the given solution is given as c=
V
n
⟹c=
0.4
0.2
⟹c=0.5 M
