Assertion: A solution of sucrose in water is
dextrorotatory. But on hydrolysis in the presence of little hydrochloric acid,
it becomes levorotatory.
Reason: Sucrose hydrolysis gives equal amounts of glucose and fructose.
As a result of this change in sign of rotation is observed.
H2O + H2O ↔ H3O+
+ OH-
acid 1 + base 1 ↔ acid 2 +
base 2
HF + H2O ↔ H3O+
+ F-
acid 1 + base 1 ↔ acid 2 +
base 2
Conjugate
bases are OH- and F- respectively
( Λº )HoAC = ( Λº)HCl + ( Λº)NaOAC - ( Λº)NaCl
= (426.2 + 91) −(126.5)
= 390.7
Predict the product Z in the following series of reactions