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The following ionisation constants are d...

The following ionisation constants are determind in 3 seperate experiments.
(I) `[Ag(S_(2)O_(3))_(3)]^(5)hArr[Ag(S_(2)O_(3))_(2)]^(3-)+S_(2)O_(3)^(-2)`
`K_(1)=2.0xx10^(-5)moldm^(-3)`
(II) `[Ag(S_(2)O_(3))_(2)]^(3-)hArr[Ag(S_(2)O_(3))_(2)]^(-)+S_(2)O_(3)^(-2)`
`K_(2)=3.3xx10^(-5)moldm^(-3)`
(III) `[Ag(S_(2)O_(3))]^(-)hArrAg^(+)+S_(2)O_(3)^(2-)`
`K_(3)=1.5xx10^(-9)moldm^(-3)`
Which of the following is the most stable

A

`[Ag(S_(2)O_(3))]^(5-)`

B

`[Ag(S_(2)O_(3))_(2)]^(3-)`

C

`[Ag(S_(2)O_(3))]^(-)`

D

`S_(2)O_(3)^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Higher is the charge density on the central ion greater in the stability
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Find the the number of ions having S-S bond from the following S_(2)O_(4)^(-2), S_(2)O_(6)^(-2), S_(2)O_(2)^(-2), S_(2)O_(3)^(-2), S_(2)O_(7)^(-2)

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Knowledge Check

  • The following ionisation constants are determind in 3 seperate experiments. (I) [Ag(S_(2)O_(3))_(3)]^(5)hArr[Ag(S_(2)O_(3))_(2)]^(3-)+S_(2)O_(3)^(-2) K_(1)=2.0xx10^(-5)moldm^(-3) (II) [Ag(S_(2)O_(3))_(2)]^(3-)hArr[Ag(S_(2)O_(3))_(2)]^(-)+S_(2)O_(3)^(-2) K_(2)=3.3xx10^(-5)moldm^(-3) (III) [Ag(S_(2)O_(3))]^(-)hArrAg^(+)+S_(2)O_(3)^(2-) K_(3)=1.5xx10^(-9)moldm^(-3) In which of the equilibrium system, the concentration of S_(2)O_(3)^(-2) is maximum.

    A
    I
    B
    II
    C
    III
    D
    same conc in all

  • The following ionisation constants are determind in 3 seperate experiments. (I) [Ag(S_(2)O_(3))_(3)]^(5)hArr[Ag(S_(2)O_(3))_(2)]^(3-)+S_(2)O_(3)^(-2) K_(1)=2.0xx10^(-5)moldm^(-3) (II) [Ag(S_(2)O_(3))_(2)]^(3-)hArr[Ag(S_(2)O_(3))_(2)]^(-)+S_(2)O_(3)^(-2) K_(2)=3.3xx10^(-5)moldm^(-3) (III) [Ag(S_(2)O_(3))]^(-)hArrAg^(+)+S_(2)O_(3)^(2-) K_(3)=1.5xx10^(-9)moldm^(-3) The complex formation constant for the reaction Ag+2S_(2)O_(3)^(-2)hArr[Ag(S_(2)O_(3))_(2)]^(3-)

    A
    `3.3xx10^(-5)`
    B
    `1.5xx10^(-9)`
    C
    `4.95xx10^(-14)`
    D
    `2xx10^(13)`

  • Ag Br_(s) + 2S_2O_(3(aq) ) ^(2-) hArr Ag (S_2O_3)_(2(aq) ) ^(3-) +Br_(aq) ^(-) [Using : K_(sp) (AgBr) = 5xx 10 ^(-13) K_(f) (Ag(S_2O_3) _2^(3-) ) =5xx 10^(13) ] What is the molar solubility of AgBr in 0.1 M Na_2S_2O_3

    A
    ` 0.5 M`
    B
    ` 0.45 M`
    C
    ` 0.045 M`
    D
    None of these

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