Three: 1.5, 6.35, 15.2 (see Schiller J., Arnhold J., Schwinn J., Sprinz H., Brede O., Arnold K., Free Rad. Res., 1999, 30: 45ff)
To calculate the isoelectric point using three pKa values, find the average of the two pKa values closest to the pH at which the molecule carries no net charge.
Glycine has two pKa values because it has two ionizable groups: the amino group (-NH2) and the carboxyl group (-COOH). The pKa values correspond to the acidity constants of these groups when they donate or accept protons.
two scientists named Wiedemann and Schmid
To calculate the isoelectric point using 3 pKa values, find the average of the two pKa values closest to the pH at which the molecule carries no net charge.
There are no accurate pKa value of these two, extremely STRONG acids, any value of >> 1000 (up to >> 1.0*10+9) will do.
To calculate the isoelectric point using three pKa values, find the average of the two pKa values closest to the pH at which the molecule carries no net charge.
Glycine has two pKa values because it has two ionizable groups: the amino group (-NH2) and the carboxyl group (-COOH). The pKa values correspond to the acidity constants of these groups when they donate or accept protons.
There are two answers: bicarbonate has two pKa's - because bicarbonate can gain a proton to become carbonic acid or lose a proton to become carbonate. Two reactions; two pKa's. The pKa for bicarbonate carbonic acid reaction is 6.4 The pKa for bicarbonate carbonate reaction is 10.3 Both pKa's are temperature sensitive.
two scientists named Wiedemann and Schmid
To calculate the isoelectric point using 3 pKa values, find the average of the two pKa values closest to the pH at which the molecule carries no net charge.
Clindamycin phosphate has two acidic protons with pK1 = 0.964 and pK2 = 6.081.
There are no accurate pKa value of these two, extremely STRONG acids, any value of >> 1000 (up to >> 1.0*10+9) will do.
please I need the answer of this question urgently
The pKa value for sodium bicarbonate (NaHCO3) is 10.3. This provides a measure of the acid strength of bicarbonate. People often make the mistake of reporting the pKa value of 6.3 for bicarbonate. However, that is the pKa value of carbonic acid (not bicarbonate). It relates to the ease of the first deprotonation of carbonic acid to form bicarbonate. The pKa of bicarbonate relates to the deportation of bicarbonate to form carbonate. This distinction is important, since carbonic acid has two pKa's, the higher of which represents that second deprotonation.
one or two or three??? one or two or three???
Two and three fourths of anything is 2¾ or 2.75
Still three.