Does hydroxide have a pKa?

Hydroxide ion, HO(-) is not on the left side of the pKa table, but it is on the “inverse” pKa table – it is the conjugate base of water, H2O. So CH4 is the acid and HO(-) is the base in this reaction. Water has a pKa of ~15, and CH4 has a pKa of 50.

How is pKa calculated?

The calculation is straightforward if you know the solution’s concentration and pH. Calculate the pKa with the formula pKa = -log(Ka). For example, pKa = -log(1.82 x 10^-4) = 3.74.

What is the pKa of sodium?

Non-Zwitterionic Buffer
Compound	Formula	pKa at 20 °C
Sodium Cacodylate	(CH3)2AsO2Na (H2O)3
Sodium Carbonate, anhydrous decahydrate	Na2CO3 Na2CO3 (H2O)10
Sodium Phosphate, monobasic	NaH2PO4 (H2O)2	7.21

Is NaOH more acidic or basic?

The H+ ions combine with water molecules to form H3O+ so the solution becomes acidic. Now let’s look at lye, a strong base with the chemical formula NaOH (sodium hydroxide). If we add NaOH to water, it dissociates into Na+ and OH-. The sodiums don’t do anything important, but the hydroxyls make the solution more basic.

What is a pKa in chemistry?

pKa is a measure of the tendency of a molecule or ion to keep a proton, H+, at its ionization center(s). It is related to the ionization capabilities of chemical species.

What is the pKa of nacl?

Property	Value
Bulk density (g ml⁻¹)	2.17
Dissociation constant pKa) at 25 °C	–
–
Vapour pressure at 20 °C (mPa)	1.00 X 10-10

What is the pKa of sodium dihydrogen phosphate?

6.8-7.2
Other names – Monobasic sodium phosphate, Monosodium phosphate (MSP)

NaH2PO4	Sodium dihydrogen phosphate
Molecular Weight/ Molar Mass	119.98 g/mol
pKa	6.8-7.2
Melting Point	212.0oC
Chemical Formula	NaH2PO4

What is the base of NaOH?

NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions.