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Grade: 12th pass

                        

Which is stronger acid R-OH or R-SH .And why explain for 2marks.

one year ago

Answers : (2)

Arun
25211 Points
							R-SH is much stronger acid than R-OH because the size of sulphur atom is much bigger than oxygen atom thereby making the bond length of S—H much longer than O—H bond
						
one year ago
Vikas TU
13784 Points
							
Dear student 
R-SH is much stronger acid than R-OH because the size of sulphur atom is much bigger than oxygen atom thereby making the bond length of S—H much longer than O—H bond.
And we know, longer is the bond, More easy it it is to break.
Bond length is inversely proportional to the bond enthalpy(the energy required to break any bond)
Cleavage of S—H and O—H bond is necessary to release Hydrogen ion (H^+). Any species which can release Hydrogen ion easily, is considered to be a stronger acid(according to Arrhenius theory of acids and bases)
Out of RSH and ROH,
RSH can release Hydrogen ion easily than ROH Because bond enthalpy of S—H bond is much lower than O—H
one year ago
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