JAMB - Chemistry (1990 - No. 38)
2.0g of a monobasic acid was made up to 250 cm3 with distilled water. 25.00 cm3 of this solution required 20.00cm3 of 0.1 M NaOH solution for complete neutralization. The molar mass of the acid is?
200 g
160 g
100 g
50 g
설명
Ma = (MbVb)/(Va) = (0.1 m χ 20 cm3)/(25cm) = 0.08 m
M = (concentration in g/dm3)/(m) = (8)/(0.08) = 100 g
M = (concentration in g/dm3)/(m) = (8)/(0.08) = 100 g