Answer:
Molarity = 7.8 M
Explanation:
Given data:
Mass of solute = 25.0 g
Volume of solution = 100.0 mL (100/1000 = 0.1 L)
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
First of all we will calculate the number of moles of solute:
Number of moles = mass/molar mass
Number of moles = 25.0 g/ 32.04 g/mol
Number of moles = 0.78 mol
Now we will put the values in formula.
Molarity = 0.78 mol / 0.1 L
Molarity = 7.8 mol/L
Molarity = 7.8 M
