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The approach to the following equilibriu...

The approach to the following equilibrium was observed kinetically from both directions :
`PtCl_(4)^(2-) + H_(2)O ? [Pt(H_(2)O)Cl_(3)^(-)]+Cl^(-)" at "25^(@)C`, it was found that
`-(Delta)/(Delta t) [PtCl_(4)^(2-)]=[3.9xx10^(-5)" sec"^(-1)] [PtCl_(4)^(2-)]-[2.1xx10^(-3)" L. mol"^(-1)" sec"^(-1)]xx[Pt(H_(2)O)Cl_(3)]^(-)[Cl^(-)]` What is the value of equilibrium constant for the complexation of the fourth `Cl^(–)` by Pt(II) ?

Text Solution

Verified by Experts

The correct Answer is:
(53*85)
For forward reaction , ` ((dx)/(dt))_(f) = k_(f) [PtCl_(4)^(2-)]`
For backward reaction,
` ((dx)/(dt))_(b) = k_(b) [ Pt (H_(2)O)Cl_(3)^(-)][Cl^(-)]`
Net ` (dx)/(dt) = k_(f) [ Pt Cl_(4)^(2-)] -k_(b) [Pt (H_(2)O)Cl_(3)^(-)][Cl^(-)]`
Comparing with the given expression
` k_(f) = 3*90 xx 10^(-5) s^(-1)`
and `k_(b) = 2*1 xx 10^(-3) L " mol "^(-1)s^(-1)`
` :. K_("forward ") =1/K_("forward") = 1/(1*86 xx 10^(-2))=53*85`
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The approach to the following equilibrium was observed kinetically form both directions: [PtCl_(4)]^(2-) +H_(2)O hArr [Pt(H_(2)O)Cl_(3)]^(ɵ)+Cl^(ɵ) At 25^(@)C it was found that at 0.3 inoic strength - (Delta [PtCl_(4)]^(2-))/(Delta t) = (3.9 xx 10^(-5)s^(-1))[PtCl_(4)]^(2-) - (2.1 xx 10^(-3) L mol^(-1) s^(-1))[Pt(H_(2)O)Cl_(3)]^(ɵ)[Cl_(3)^(ɵ)] What is the value of k for the complexation of the fourth Cl^(ɵ) by Pt(II) at 0.3 ionic strenght.

The approach to the following equilibrium was observed kinetically from both directions Pt Cl_(4)^(2-) +H_(2)O hArr Pt (H_(2)O) Cl_(3)^(-) +Cl^(-) "at " 25^(@)C . It was found that - (d[PtCl_(4)^(2-)])/(dt) = (3.9 xx10^(-5)) [Pt Cl_(4)^(2-)] - (2.1 xx10^(-3)) [ Pt (H_(2)O) Cl_(3)^(-) ] [Cl^(-)] Calculate the equilibrium constant for the complexation of the fourth Cl^(-) by Pt(II) .

Knowledge Check

  • The oxidation number of Pt in [Pt (C_(2)H_(4))Cl_(3))"]"^(ө) is

    A
    `+1`
    B
    `+2`
    C
    `+3`
    D
    `+4`

  • The correct name of [Pt(NH_(3))_(4)Cl_(2)][PtCl_(4)] is

    A
    Tetraammine dichloro platinum (iv) tetrachloro platinate (ii)
    B
    Dichloro tetra ammine platinium (iv) tetrachloro platinate (ii)
    C
    Tetrachloro platinum (ii) tetraammine platinate (iv)
    D
    Tetrachloro platinum (ii) dichloro tetraammine platinate (iv)

  • The oxidation number of Pt in [Pt(H_(2)O)Cl_(3)]^(-) is

    A
    `+1`
    B
    `+2`
    C
    `+3`
    D
    `+4`

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