To determine the number of grams of NaOH solid in the given solution, we need to use the molarity (M) and the molar mass (M.Wt) of NaOH.
Given: Mass of NaOH solution = 2 kg Molarity of NaOH solution = 0.4 M Molar mass of NaOH = 40 g/mol
First, we need to find the number of moles of NaOH in the solution using the equation:
moles = Molarity × volume (in liters)
Since we don't have the volume of the solution, we'll assume it to be 1 liter for convenience.
moles of NaOH = 0.4 M × 1 L = 0.4 moles
Now, we can calculate the mass of NaOH using the equation:
mass = moles × molar mass
mass of NaOH = 0.4 moles × 40 g/mol = 16 grams
Therefore, there are 16 grams of NaOH solid in 2 kg of NaOH solution with a molarity of 0.4 M.