Answer:
Number of moles = 0.75 mol
Mass = 118.5 g
Explanation:
Given data:
Number of moles of KMnO₄ = ?
Mass in gram = ?
Molarity of KMnO₄ = 0.25 M
Volume of KMnO₄ solution = 3 dm³ (3 L)
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 / L of solution
0.25 M = number of moles / 3 L
Number of moles = 0.25 M× 3 L
M = mol/L
Number of moles = 0.75 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.75 mol × 158 g/mol
Mass = 118.5 g
