What is the PK value of HCl?

What is the PK value of HCl?

Hydrochloric acid (HCl): pKa = -6.3.

What is the pKa of ammonia?

The pKa of ammonia itself is 38, which measures the equilibrium constant for dissociation of NH3 to give its conjugate base, NH2(-) and H+.

What is the Ka of H3O+?

The Ka for H3O+ would be defined as Ka = [H+] [H2O] / [H3O+] . But [H+] is the same as [H3O+] , so Ka = [H2O] = 55.5 , or pKa = -1.7 .

What does pKa stand for in chemistry?

The pKa is the pH value at which a chemical species will accept or donate a proton. The lower the pKa, the stronger the acid and the greater the ability to donate a proton in aqueous solution. The Henderson-Hasselbalch equation relates pKa and pH.

What is pKa of nh3?

The pKa for ammonia is ~37.

What is the pKa of CH3OH2?

3. The pKa of CH3OH2+ (protonated methanol) is -2.2.

How do you find the pKa of an acid?

Calculate the pKa with the formula pKa = -log(Ka). For example, pKa = -log(1.82 x 10^-4) = 3.74.

What is the pH of 5M HCl?

5M HCl is about 5.5m, and activity coefficient is dramaticly increasing with concentration (see table I of the pH paradox reference) so the true pH deviates somewhat further from -0.69, but pH = -1.1 is a reasonable estimate.

What are the values of the functional group pKa?

Approximate pKa chart of the functional groups:  values to know  1.  Protonated carbonyl  pKa = ‐7                                                   Other important pKa’s  2. Protonated alcohol or ether   pKa = ‐2 to ‐3    H2 = 35   3. Carboxylic acid   pKa = 4‐5  4. Ammonium ion   pKa = 9‐10  5. Phenol  pKa = 10  6.

What happens when the nitro group is in the α position?

When β-nitroketones or derivatives thereof are treated under basic conditions, elimination of nitrous acid takes place to give α,β-unsaturated carbonyl compounds. If the nitro group is in the α-position, alkene formation is impossible directly. However]

How is the nitro group on a phenyl ring reduced?

The nitro group on a phenyl ring carrying a chloro and a cyano group was also reduced to the amine employing tin chloride < 84TL839> and the nitro group on an aromatic ring was reduced in preference to the one on an alkyl chain by the use of dry sodium sulfide in ethanol <88TL635 >.

What is the PK of ethanol and acetic acid?

The first model pair we will consider is ethanol and acetic acid, but the conclusions we reach will be equally valid for all alcohol and carboxylic acid groups. Despite the fact that they are both oxygen acids, the pK a values of ethanol and acetic acid are strikingly different.