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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.
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PKa of NaHCO3?
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.
What is the pKa value of sodium borohydride?
The pKa value of sodium borohydride is approximately 13.
What is pka value for sodium carbonate?
The pKa for HCO3- ----> CO3-2 + H+ is 10.33 I assume you would have a reaction such as K+ HCO3- + H2O ------> K+CO3-2 + H3O+ In which the potassium acts as a neutral ion.
What is the pKa value for sodium octanesulfonate?
The pKa value for sodium octanesulfonate is typically around 2.0 to 2.5.
Is sodium benzoate soluble in sodium chloride?
Yes, Benzoic acid is a weak acid (pKa ~ 4.2) that will dissolve in weak base such as sodium bicarbonate (pKa ~ 6.4)
What is the pKa value of a ceftriaxone?
The pKa value of ceftriaxone is approximately 3.8.
What is pka value for sodium hydride?
The pKa value for sodium hydride (NaH) is approximately 36. This means that NaH is a very strong base that readily donates a proton in a reaction.
Why sodium hydrogensulphate functions as an acid and look up its pKa value?
Sodium hydrogensulfate contains the HSO4- ion therfore it can function as an acid. It's pKa value is 1.9.
What is the Pka of sodium hydroxide?
Sodium hydroxide is a strong base and does not have a pKa value. Instead, it dissociates completely in water to form hydroxide ions (OH-) and sodium ions (Na+).
Why is bicarbonate of soda alkaline?
Its ability to accept protons (basic property) is somewhat stronger (lower pK-value) than its proton donating property (very weak acid, higher pKa):base: HCO3- + H+ ---> H2CO3 pKb=7.64acid : HCO3- -> H+ + CO32- pKa=10.25As proof of this the pH value of a pure sodium bicarbonate is just above 7: pH about 8.0
What is the pka value of Doxofylline?
The pKa value of Doxofylline is approximately 4.22.
Is sodium bicarbonate blue?
Sodium bicarbonate is white.
