What is pka value for sodium bicarbonate?
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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Sodium bicarbonate is an OTC medicine that can help to settle an upset stomach.
The conjugate acid is Hydrogen (H2), the pKa of which is 35.
for H3PO4 pKa = 2.15 for NaH2PO4 pKa = 7.2 for Na2HPO4 pKa = 12.4
There is no way to know the pH of sodium bicarbonate unless the concentration of [H+] or [OH-] is known. If the concentration is known, pH can be calculated as the -log[H+], o…r 14-(-log[OH-]).
Pka, (acid-ionization constant) is a measure of strength of an acid in a solution and is the equilibrium constant chemical reaction dissociation in acid based reactions. Sodiu…m chloride or "table salt" has strong bases and acids and would not need Pka.
i think pH value of sodium carbonate is 2
0.2 is the pKb for sodium Hydroxide not the pKa the pKa is 13.8
The effective range should be the pKa +/- 1.. Therefore, the range should be 1.15 to 3.15.
Sodium chloride, NaCl, is not an acid so it does not have a Ka orpKa value. Sodium chloride is a neutral salt.
pH of a equi-molar solution of Na-carbonate is much higher ( >10 mostly) than of the same Na-bicarbonate (pH roughly 8). The first contains a (bi-ionic) double base : CO … 3 2- while the 2 nd contains one mono-acid and a mono-basic ( ampholyte ) ion: HCO 3 -
From this salt the benzoate ion C6H5-COO - is a base ( the other part Na + is neutral). This base has a pK B value of 9.80 ( benzoate ) The pK a cid value of its… conjugated benzoic acid ( C6H5-COOH) however is pK benzoic -acid = 4.20 = pK a (which is (not surprisingly) equal to 14.0-pK base = 14.0-9.80)
Sodium hydrogensulfate contains the HSO4- ion therfore it can function as an acid. It's pKa value is 1.9.