How many grams of a 54 % solution of H2SO4 must be weighed in order to be diluted to a volume of 500 ml with molarity of 0.4 mol/L ?
For the first question: Calculate: - the number of moles of solute in the diluted solution to be prepared. - the mass of this solute; its mass must be equal to the mass of solute in the volume taken from the concentrated solution. - finally the mass of the concentrated solution