2007-08-15 19:48:33 · 3 answers · asked by Adeel 2 in Science & Mathematics ➔ Chemistry
There is one acidic hydrogen, the one attached to the triple bond. It has a pKa of about 25.
2007-08-16 04:42:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
ethyne acidic hydrogen is H+ ion. it is acidic because it is electron undesirable.(observe the +ve cost) ordinarily, acidity of hydrogen specifically relies upon on the atom that holds it. For acidity evaluation, get rid of the H from the atom as H+ and then examine the steadiness of -ve cost on the substrate (the atom which holds the H interior the molecule). If the -ve cost is extra stabilised then it is a superb acid. [e.g M-H = M- and H+ (the place M is any atom or area of a molecule) now examine for the steadiness of -ve cost on M extra the steadiness of -ve cost, extra effective is the acid] electronegativity of carbon in ethyne is extra.(confer with hybridisation. it is extra electronegative by using bigger s character than the carbon in remaining 3 molecules) consequently, it could occupy the -ve cost extra quite. additionally, extra electronegativity of carbon in ethyne will polarise the C-H bond and it's going to likely be undemanding to get rid of the hydrogen.
2016-12-30 15:15:38 · answer #2 · answered by kralovetz 4 · 0⤊ 0⤋
1 - just the linear H at the end of the molecule.
2007-08-15 20:58:05 · answer #3 · answered by Gervald F 7 · 1⤊ 0⤋