Question

If w/v℅ = 40℅ and density = 1.2g/cm³ then find w/w% , solute, solvent, solution​

Answer 1

Answer:

40% w/v = 40 g of solute dissolved in 100 ml of solution

density=mass/volume

1.2 = mass/ 100

1.2 ×100=mass

120g = mass of solution

mass of solute+mass of solvent= 120

40 + mass of solvent=120

mass of solvent = 120 - 40

mass of solvent = 80

now

w/w% of solute

w/w% =(mass of solute/ mass of solution) ×100

w/w%= (40/120) ×100

w/w%= 33.333%

now for solvent

w/w% = (mass of solvent/mass of solution) × 100

w/w% = (80/120) ×100

w/w% = 66.666%

now for solution

w/w% = (mass of solution / mass of solution)×100

w/w% = (120/120) ×100

w/w% = 1 × 100

w/w% = 100%

another method for finding w/w% of solution

w/w% of solute + w/w% of solvent = w/w% of solution

33.33 + 66.66 = 100%