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Potassium Dichromate

Which of the ...

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Which of the following combinations will make a buffer solutions?(i) CH3COONa (2 mol) + HCl (1 mol)(ii) CH3 COOH (2 mol) + NaOH (1 mol)(ii) CH3COOH (1 mol) + CH3COONa (1 mol)(1) (iii)(2) (i), (ii)(3) (ii), (iii)(4) (i), (ii), (ii)

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Q. Calculate the ratio of pH of a solution containing 1 mol. of

C H_{3} C O O N a + 1 m o l

of HCl per litre and of other solution containing 1 mol of

C H_{3} C O O N a + 1 m o l

C H_{3} C O O H

Λ^{O}

N a C l, H C l

{C H}_{3} C O O N a

126.0, 426.0

91.0 S {c m}^{2} {m o l}^{- 1}

respectively. Calculate

Λ^{O}

{C H}_{3} C O O H

Q. Molar conductives

(Λ_{m}^{o})

at infinite dilution of

N a C l, H C l

{C H}_{3} C O O N a

126.4, 425.9

91.0 S {c m}^{2} {m o l}^{- 1}

Λ_{m}^{o}

{C H}_{3} C O O H

{C H}_{3} C O O H

{C H}_{3} C O O N a

{C H}_{3} {C O N H}_{2}

Among these compounds, the correct order of resonance energy is:

Q. Given the limiting molar conductivity as:

A_{m}^{\infty} (H C l) = 126.4 Ω^{- 1} {c m}^{2} {m o l}^{- 1}

A_{m}^{\infty} (N a C l) = 425.9 Ω^{- 1} {c m}^{2} {m o l}^{- 1}

A_{m}^{\infty} ({C H}_{3} C O O N a) = 91 Ω^{- 1} {c m}^{2} {m o l}^{- 1}

The molar conductivity at infinite dilution of acetic acid

(i n Ω^{- 1} {c m}^{2} {m o l}^{- 1})

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