Ionic Equilibri...

10^-2 mole of NaOH was added to 10 litre of water. The pH will change by

If an acidic indicator HIn Ionizes as HIn ⇌ H⁺ + In^– . To which maximum pH value its solution has distinct colour characteristic of HIn?

The H⁺ ion concentration in 0.001M CH₃CO₂H(K_a = 1.8 × 10^-5) is 1.34 × 10^-4 g ion/L. The H⁺ ion concentration if 0.164g of CH₃CO₂Na is added to a litre of 0.001M CH₃CO ₂H will be

What is the minimum pH required to prevent the precipitation of ZnS in a solution that is 0.01 M ZnCl₂ and saturated with 0.10 M H₂S ?

[Given Ksp = 10–21 , Ka1 × Ka2 = 10–20]

Ammoniacal solution of Ag⁺ + Acidified solution of N₂H₄ → ppt of (X)

100 ml solution (I) of buffer containing 0.1(M) HA and 0.2 (M) A^– , is mixed with another solution (II) of 100 ml containing 0.2(M) HA and 0.3(M) A^–

After mixing what is the pH of resulting solution ? Given pK_a of HA = 5

Which of the following is/are soft bases?

H₂O, H^– , CO,CO₂, C₂H₄, CN^–

Calcium lactate is a salt of weak organic acid and strong base represented as Ca (LaC)₂ . A saturated solution of Ca (LaC)₂ contains 0.6 mole in 2 litre solution. pOH of solution is 5.60. If 90% dissociation of the salt takes place, then what is pK_a of lactic acid ?

Fixed volume of 0.1 M benzoic acid (pK_a = 4.2) solution is added into 0.2 M sodium benzoate solution and formed a 300 ml, resultant acidic buffer solution. If pH of this buffer solution is 4.5 then find added volume of benzoic acid -

The Ksp of FeS = 4 × 10^–19 at 298 K. The minimum concentration of H⁺ ions required to prevent the precipitation of FeS from a 0.01 M solution Fe²⁺ salt by passing H₂S is –