What is the Ka expression for nitrous acid?
The equilibrium constant for this expression is called the acid dissociation constant, Ka….
| Weak Acid | Equation | Ka |
|---|---|---|
| nitrous acid | HNO2 H+ + NO2- | 4.0 × 10-4 |
| phenol | HOC6H5 H+ + OC6H5- | 1.6 × 10-10 |
| propionic acid | CH3CH2CO2H H+ + CH3CH2CO2- | 1.3 × 10-5 |
How do you find the Ka expression?
Ka and Kb values measure how well an acid or base dissociates. Higher values of Ka or Kb mean higher strength. General Ka expressions take the form Ka = [H3O+][A-] / [HA].
What is the pKa of nitrous acid?
The pKa of nitrous acid was measured as 3.16 at 25 °C, and the enthalpy and entropy of nitrous acid dissociation were calculated from measurements as 6.7 kJ mol-1 and -38.4 J mol-1 K-1, respectively, between 25 and 45 °C.
What is the formula of KA of weak acid is?
The pH equation can also be algebraically re-written to solve for the concentration of hydronium ions: [H3O]+=10−pH. Ka: is the acid disassociation constant and measures how well an acid dissociates in the solution, such as in water. Ka is represented as Ka=[H3O+][A−][HA]
What is the Ka of HCl?
1.3 * 106
| Ka | Acid | |
|---|---|---|
| 1.3 * 106 | Hydrochloric acid | HCl |
| 1.0 * 103 | Sulfuric acid | H2SO4 |
| 2.4 * 101 | Nitric acid | HNO3 |
| ——– | Hydronium ion | H3O+ |
What is the pKa of HClO?
Hypochlorous acid, HClO, has a pKa of 7.54.
What is basicity of nitrous acid?
Monobasic: Since Nitrous acid HNO2 has only one hydrogen ion which it can donate to a base in case of a reaction between an acid and a base, it is known as a monobasic acid. It can release only one proton, i.e., H+ in solution. Unstable: Nitrous acid is highly unstable in nature, and so mostly found in its liquid form.
What is the conjugate base of HClO?
Identifying conjugate acid–base pairs
| Equation | Acid | Conjugate base |
|---|---|---|
| HClO 2 + H 2O → ClO − 2 + H 3O + | HClO 2 | ClO − 2 |
| ClO − + H 2O → HClO + OH − | H 2O | OH − |
| HCl + H 2PO − 4 → Cl − + H 3PO 4 | HCl | Cl − |
Is nitrous acid a strong acid?
Nitrous acid (HNO2), a weak acid, is very unstable and exists only in aqueous solution.
How do you find Ka without pKa?
Set up an ICE table for the chemical reaction. Solve for the concentration of H3O+ using the equation for pH: [H3O+]=10−pH. Use the concentration of H3O+ to solve for the concentrations of the other products and reactants. Plug all concentrations into the equation for Ka and solve.
Is HCl stronger than HClO?
Order in the increasing order of acidity:HCl, H2SO4, HF, HCl, HI, HBr, HNO3, HBrO, HClO, HClO3, HClO4, H2S, H3PO4(?)
What is HClO formula?
HClOHypochlorous acid / Formula