Home
Class 12
CHEMISTRY
pH of a 0.1M HCN solution is 5.2. What i...

pH of a 0.1M HCN solution is 5.2. What is the value of Ka for the acid?

Text Solution

AI Generated Solution

To find the value of \( K_a \) for the weak acid HCN, given that the pH of a 0.1 M solution is 5.2, we can follow these steps: ### Step 1: Calculate the concentration of \( H^+ \) ions The pH of the solution is given as 5.2. We can use the formula for pH to find the concentration of hydrogen ions (\( H^+ \)): \[ \text{pH} = -\log[H^+] \] Rearranging this gives: ...
Promotional Banner

Similar Questions

Explore conceptually related problems

HA is a weak acid. The pH of 0.1 M HA solution is 2. What is the degree of dissociation (alpha) of HA ?

The pH of a 0.1 molar solution of the acid HQ is 3 . The value of the ionisation constant, K_(a) of the acid is

The pH of a 0.1 molar solution of the acid HQ is 3 . The value of the ionisation constant, K_(a) of the acid is

pH of a strong acid solution is 2 . What volume of water must be added to its 1L of solution so that pH of new solution becomes 3 ?

The pH of a solution is 5. to this solution acid was added so that its pH value bcomes 2.0. The increase in H^(+) concentration is :

The degree of ionisation of a 0.1 M bromoacetic acid solution is 0.132. Calculate the pH of the solution and the rhoK_a bromoacetic acid.

How much moles of sodium propionate should be added to 1L of an aqueous solution containing 0.020 mol of propionic acid to obtain a buffer solution of pH 4.75 ? What will be the pH if 0.010 mol of HCI is dissolved in the above buffer solution. Compare the last pH value with the pH of 0.010 M HCI solution. Dissociation constant of propionic acid, K_(a) , at 25^(@)C is 1.34 xx 10^(-5) .

Fixed volume of 0.1M benzoic acid (pK_(a) = 4.2) solution is added into 0.2M sodium benzote solution and formed a 300mL , resulting acidic buffer solution. If pH of the resulting solution is 3.9 , then added volume of banzoic acid is

If the pH value is 4.5 for a solution then what is the value of H^(+) concentration?

1 M benzoic acid (pK_(a)=4.2) and 1 M C_(6)H_(5)COONa solutions are given separately. What is the volume of benzoic acid required to prepare a 93mL buffer solution of pH=4.5 ?