solve Q 18 ans. 1.5ml plz dont give link
Molar molecular mass of silver nitrate =169.9 g/mol
Number of moles in 16 mg or silver nitrate = 16 x 10-3 g / 169.9 gmol-1
= 9.417 x 10-5 mol
Number of moles in 40 mg of silver nitrate = 40 x 10-3 g / 169 gmol-1
= 23.67 x 10-5 mol
Molarity of 1st solution (M1) = 9.417 x 10-5 mol/ml
Molarity of 2nd solution (M2) = 23.67 x 10-5 mol/ml
Let V ml of water is added to 1st solution of M1 molarity to change to change it into 2nd solution of M2 molarity.
i.e...
(9.417 x 10-5 mol) / (1 ml) = (23.67 x 10-5 mol) / (1 ml+ V ml)
By solving the above equation
V = 1.5135 ml