Benzyl alcohol (I) can oxidize to Benzaldehyde (II), which may continue to oxidize and form the carboxylic acid known as Benzoic acid (III) during storage. As such oxidation occurs, what is your prediction of Rf values and elution sequence, of a sample containing I, II and III is tested with proper eluent(sby TLC

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .