Answer:
270g
Explanation:
Given parameters:
Concentration of solution = 1.5M
Volume of solution = 4.5L
Unknown:
Mass of NaOH added = ?
Solution:
Concentration is the number of moles of solute found in a solution.
To solve this problem, we need to find the number of moles of NaOH first;
Number of moles = concentration x volume
Number of moles = 1.5 x 4.5 = 6.75moles
Now, to find the mass of NaOH;
Mass of NaOH = number of moles x molar mass
Molar mass of NaOH = 23 + 16 + 1 = 40g
Mass of NaOH = 6.75 x 40 = 270g
