What is the Ka value for HF?
| Ka | Acid | |
|---|---|---|
| 6.6 * 10-4 | Hydrofluoric acid | HF |
| 1.8 * 10-4 | Methanoic acid | HCO2H |
| 6.3 * 10-5 | Benzoic acid | C6H5COOH |
| 5.4 * 10-5 | Hydrogen oxalate ion | HO2C2O2- |
What is the Ka value of NH4Cl?
Ka value of NH4Cl at 250C is taken as 5.55 * 10-10 mol dm-3.
What are the major species in an aqueous solution of HF the Ka value for HF is 7.2 10 4?
What are the major species in solution? We know that HF is a weak acid (Ka = 7.2×10-4), so the major species resulting from HF are HF and H2O.
Is NH4Cl acidic basic or neutral?
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.
What is the Ka of HF at 25 C?
The Ka of hydrofluoric acid (HF) at 25∘C 25 ∘ C is 6.8×10−4 6.8 × 10 − 4 .
Is HF an acid or base?
weak acid
Hydrofluoric acid (HF) is not a strong acid but instead a weak acid. It is classified as a weak acid mainly because it fails to completely dissociate in water.
Which compound has a value of KA that is close to 10 5?
| Ka of Weak Acids | ||
|---|---|---|
| Name | Formula | Ka |
| acetic | HC2H3O2 | 1.8 x 10-5 |
| ascorbic (I) | H2C6H6O6 | 7.9 x 10-5 |
| ascorbic (II) | HC6H6O6- | 1.6 x 10-12 |
What is the pH of a 0.25 M solution of HF?
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 deg C is 2.03.
Is nh4cl a strong acid?
Ammonium chloride is a strong electrolyte because it dissolved fully into ions or 100% ionized in an aqueous solution….Is Ammonium chloride (NH4Cl) an acid or base? Weak vs Strong.
| Name of Molecule | Ammonium chloride |
|---|---|
| Acidity (pKa) | 9.24 |
What is the Ka value?
What is the Ka value? The acid dissociation constant (Ka) is used to distinguish strong acids from weak acids. Strong acids have exceptionally high Ka values. 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.
What is the Ka for HCl?
Acid-Base Equilibria The key to this calculation is remembering that HCl is a strong acid (Ka = 106) and that acids as strong as this can be assumed to dissociate completely in water.
Why is HF is a weak acid?
HF is a weak acid because the bond between Hydrogen and Fluorine is so short. It is more difficult for the bond to be broken, so it will not completely dissociate in water.