ILLUSTRATION 8 1 If the density of methanol is 0 793 g mL

Last updated: 7/2/2023

ILLUSTRATION 8 1 If the density of methanol is 0 793 g mL what is its volume needed for making 2 5 L of its 0 25 M solution Solution We know M WBX 1000 MB XV Given M 0 25 mB 32 V 2500 mL 0 25 We know WB X1000 32 2500 Mass Volume x Density 20 Volume 0 793 Volume 25 22 mL or we 20 g ILLUSTRATION 8 2 Molarity of H SO4 is 0 8 and its density is 1 06 g mL What will be its concentration in terms of molality and mole fraction Solution Mass of H SO4 dissolved in 1 liter wg Mass of 1 liter solution 1000 x 1 06 1060 g Mass of solvent wA 1060 78 4 981 6 g WB X1000 78 4 1000 We know m 0 815 MB X WA 98 981 6 H Mole fraction of solute XB 0 8 nB NA NB 981 6 18 0 8 0 8 54 53 0 8 i 0 8 98 78 4 g 0 014