AIEEE 2009 | Ionic Equilibrium Question 113 | Chemistry

Solid Ba(NO₃)₂ is gradually dissolved in a 1.0 $$\times$$ 10^-4 M Na₂CO₃ solution. At what concentration of Ba²⁺ will a precipitate begin to form ?
(K_sp for BaCO₃ = 5.1 $$\times$$ 10⁻⁹ )

5.1 $$\times$$ 10^-5 M

8.1 $$\times$$ 10^-8 M

8.1 $$\times$$ 10^-7 M

4.1 $$\times$$ 10^-5 M

AIEEE 2008

MCQ (Single Correct Answer)

-1

Four species are listed below
i. $$HCO_3^−$$
ii. $$H_3O^+$$
iii. $$HSO_4^−$$
iv. $$HSO_3F$$
Which one of the following is the correct sequence of their acid strength?

iv < ii < iii < I

ii < iii < i < iv

i < iii < ii < iv

iii < i < iv < ii

AIEEE 2008

MCQ (Single Correct Answer)

-1

The pK_a of a weak acid, HA, is 4.80. The pK_b of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

9.58

4.79

7.01

9.22