Respuesta :
Answer: C= 0.406 M
Explanation:
Solution.
ν
=
0.730
m
o
l
;
ν=0.730mol;
V
=
1.8
⋅
1
0
3
m
L
=
1.8
L
;
V=1.8⋅10
3 mL=1.8L;
C=0.730mol
1.8 L=0.406 M
C= 1.8L
0.730mol =0.406M
The student made a mistake because he did not convert a unit of volume from milliliters to liters. After all, molarity is defined as the number of moles of solute per liter of solution.
Error in the student's calculation is due to not conversion of volume unit and molarity of resulting solution is 0.244 M.
What is molarity?
Molarity of any solution is define as the no. of moles of solute present in per liter of solvent.
- Given that, molarity of solution = 4.06 × 10⁻⁴ M
Moles of table sugar (solute) = 0.730 mole
Volume of water (solvent) = 1.8 × 10³ mL
For the calculation of molarity we have to covert the volume from mL to liter, so molarity is:
M = 0.730mole / 1.8L = 0.405 = 4.05 × 10⁻¹ M
From the calculation it is clear that student didn't converts the volume unit.
- In the second part following information is given:
Molarity of stock solution = 1M
Taken volume of stock solution = 0.305L
Moles of stock solution = 1M × 0.305L = 0.305 mole
Total volume of resultant solution = 1.25 L
Molarity of resultant solution by mixing of stock solution in water = 0.305mole / 1.25L = 0.244 M
Hence, molarity of resultant solution is 0.244 M.
To know more about molarity, visit the below link:
https://brainly.com/question/16343005
