## Your Online "Ionic Equilibria" Teacher

Home » Chemistry » Ionic Equilibria »

### Calculate the pH of a buffer solution containing 0.2 mole of NH4Cl and 0.1 mole of NH4OH per litre. Kb for NH4OH = 1.85 x 10-5.

According to Henderson – Hasselbalch equation: pOH = pKb + log ([salt]/ [base]) pKb = - log Kb = - log .85 x 10-5 = 4.733 Therefore, pOH = 4.733 + log (0.2 / 0.1) = 4.733 + 0.301 = 5.034 pH = 14 – pOH = 14 – 5.034 ...

### The ionization constant of formic acid is 1.8 x 10-4. Around what pH will its mixture with sodium formate give buffer solution of higher capacity? Calculate the ratio of sodium formate and formic acid in a buffer of pH 4.25.

Buffer capacity is defined as the rate of change of pH with number of moles of acid or base added. Buffer capacity = dpH / dn acid or base dpH is the change in pH and dn acid or base is the number of moles of acid ...

### The salt of strong acid and strong base does not undergo hydrolysis. Explain.

In this case, neither the cations nor the anion undergoes hydrolysis. Therefore, the solution remains neutral. For example: in the aqueous solution of NaCl, its ions Na+ and Cl- ions have no tendency to react with H+ or OH- ions of water. This is because the ...

### Derive Henderson – Hasselbalch equation?

We can derive a general equation for calculating the pH of any buffer solution. Consider a mixture of weak acid (HX) and its conjugate base. HX + H2O ⇌ H3O+ + X- Ka = [H3O+] [X-] / [HX] Taking log on both the sides, we will get: Log Ka ...

### Define Buffer Action?

Buffer action: the ability of the buffer solution to resist the changes in pH value on the addition of small amount of an acid or a base is known as buffer action. For example: consider an acidic buffer such as a solution containing an equimolar amounts ...

### What do you mean by common ion effect?

We know that weak acids and weak bases slightly ionize in water and equilibrium is established in their solutions. The phenomenon of suppression of the degree of dissociation of a weak acid or a weak base by the addition of a strong electrolyte containing a ...

### Define buffer solution with example. Also discuss its types.

The solution which resists changes in the hydrogen ion concentration on the addition of small amount of acid or base is known as buffer solution. Many medical and cosmetic formulations need a definite pH for their formulation and use. Such solutions are called buffer solutions. These ...

### What are the differences between solubility product and ionic product?

The main differences between solubility product and ionic product are given as under: Solubility product Ionic product Solubility product is the concentration of ions of  electrolyte, each raised to the power of their coefficients in the balanced chemical equation in a saturated solution. It is ...

Page 1 of 612345