What is the pKa of HNO3?

p-Toluenesulfonic acid: pKa = -2.8. Nitric acid (HNO3): pKa ≈ -1.4. Chloric acid (HClO3): pKa ≈ 1.0.

How do you find the Ka value from pKa?

To create a more manageable number, chemists define the pKa value as the negative logarithm of the Ka value: pKa = -log Ka. If you already know the pKa value for an acid and you need the Ka value, you find it by taking the antilog. In practice, this means raising both sides of the equality to exponents of 10.

What is the Ka value for?

The acid dissociation constant (Ka) is used to distinguish strong acids from weak acids. The Ka value is found by looking at the equilibrium constant for the dissociation of the acid. The higher the Ka, the more the acid dissociates. Thus, strong acids must dissociate more in water.

Is CH3NH3Br an acid or base?

(a) Methyl ammonium bromide, CH3NH3Br dissolves in water to form a weakly acidic solution. Ka(CH3NH3 +) is 2.28 x 10-11.

What is pKb value?

pKb is the negative base-10 logarithm of the base dissociation constant (Kb) of a solution. It is used to determine the strength of a base or alkaline solution. Kb = [B+][OH-]/[BOH] pKb = -log Kb. A large Kb value indicates the high level of dissociation of a strong base.

How do you calculate ka?

As noted above, [H3O+] = 10-pH. Since x = [H3O+] and you know the pH of the solution, you can write x = 10-2.4. It is now possible to find a numerical value for Ka. Ka = (10-2.4)2 /(0.9 – 10-2.4) = 1.8 x 10-5.

How do you calculate pKb?

The base dissociation constant is a measure of how completely a base dissociates into its component ions in water.

Kb = [B+][OH-]/[BOH]
pKb = -log Kb.

Is NH4Cl a weak base?

Ammonium chloride (chemical formula NH4Cl) is an acidic salt since it is a salt of a strong acid, namely hydrochloric acid, and a weak base, namely ammonium hydroxide.

Is CH3COONa an acid or base?

Solid sodium acetate (CH3COONa) is a salt, not an acid or a base. It is a salt formed from a weak acid (CH3COOH) and a strong base ( NaOH). However, on hydrolysis of CH3COONa in water, the resultant solution is basic.