A solution of weak acid was titrated wit...

A solution of weak acid was titrated with base NaOH. The equivalence point was reached when `36.12 mL` of `0.1M` NaOH have been added. Now `18.06mL 0.1M` HCI were added to titrated solution, the pH was found to be `4.92`. What is `K_(a)` of acid ?

Text Solution

Verified by Experts

The correct Answer is:

`1.2xx10^(-5);`

Topper's Solved these Questions

IONIC EQUILIBRIUM
P BAHADUR|Exercise Exercise7|33 Videos
GASEOUS STATE
P BAHADUR|Exercise Exercise -9|1 Videos
MOLE AND EQUIVALENT CONCEPT
P BAHADUR|Exercise Exercise 9 Advanced numerical problems|61 Videos

Similar Questions

Explore conceptually related problems

A solution of a weak acid was titrated was NaOH. The equivalence point was reached when 36.12 ml of 0.10 (N) NaOH have been added . Now 18.06 ml of 0.10 (N) HCl was addd to the titrated solution . The pH was found to be 4.92 .What is K_(a) of the acid ?

A solution of weak acid HA was titrated with base NaOH. The equivalent point was reached when 40 mL. Of 0.1 M NaOH has been added. Now 20 mL of 0.1 M HCl were added to titrated solution, the pH was found to be 5.0 What will be the pH of the solution obtained by mixing 20 mL of 0.2 M NaOH and 20 mL of 0.2 M HA?

A volume of 50.00 mL of a weak acid of unknown concentration is titrated with 0.10 M solution of NaOH . The equivalence point is reached after 39.30 mL of NaOH solution has been added. At the half-equivalence point (19.65 mL) , the pH is 4.85 . Thus, initial concentration of the acid and its pK_(a) values are

A 25.0 mL. sample of 010 M HCl is titrated with 0.10 M NaOH. What is the pH of the solution at the points where 24.9 and 25.1 mL of NaOH have been added?

100 mL of 0.02M benzoic acid (pK_(a)=4.2) is titrated using 0.02 M NaOH . pH values after 50 mL and 100 mL of NaOH have been added are

100mL of 0.2M benzoic acid (pk_(a)=4.2) is titrated using 0.2 M NaOH pH after 50mL and 100mL of NaOH have been added are :

P BAHADUR-IONIC EQUILIBRIUM-Exercise

0.00050 mole of NaHCO(3) is added to a large volume of a solution buff...
Text Solution
|
0.1M CH(3)COOH solution is titrated against 0.05M NaOH solution. Calcu...
Text Solution
|
A solution of weak acid was titrated with base NaOH. The equivalence p...
Text Solution
|
A weak acid HA after teratment with 12 mL of 0.1M strong base BOH has ...
Text Solution
|
To a solution of acetic acid, solid sodium acetate is added greadually...
Text Solution
|
When 40 mL of a 0.1M weak monoacid base is titrated with 0.16M HCI, t...
Text Solution
|
The [Ag^(+)] ion in a saturated solution of Ag(2)CrO(4) at 25^(@)C is ...
Text Solution
|
K(sp) of PbBr(2) is 8 xx 10^(-5). If the salt is 80% dissociated in so...
Text Solution
|
K(sp) of PbC1(2) is 10^(-13). What will be [Pb^(2+)] in a of solution ...
Text Solution
|
Calculate simultaneous solubility of AgCNS and AgBr in a solution of w...
Text Solution
|
BaSO(4) and BaCrO(4) have solubility product values in the ratio 1:2.5...
Text Solution
|
A mixture of water and AgCI is shaken until a saturated solution is ob...
Text Solution
|
Zn salt is mixed with (NH(4))(2)S of molarity 0.021M. What amount of Z...
Text Solution
|
A particular water sample has 131 ppm CaSO(4). What fraction of the wa...
Text Solution
|
To a solution of 0.1M Mg^(2+) and 0.8M NH(4)CI, and equal volume of NH...
Text Solution
|
What is the molar solubility of AgCI((g)) in 0.100M NH(3(aq.)) ? Given...
Text Solution
|
10mL of 0.3M Na(2)SO(4) are mixed with 20mL solution having initially ...
Text Solution
|
The solubility of CaCO(3) is 7mg//L. Calculate the K(sp) of BaCO(3) wh...
Text Solution
|
Calculate the solubility of AgCN in a buffer solution of pH = 3, Given...
Text Solution
|
2M solution of Na(2)CO(3) is boiled in a closed container with excess ...
Text Solution
|