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50 mL of 0.5 M Na2CO3 is titrated again...

50 mL of 0.5 M Na2CO3 is titrated against 0.1 M HCl. On adding 40 mL of HCl, pH of the solution will be:[Given for H2CO3 , pK a 1=6.35; pK a 2=10.33; log3=0.477, log2=0.30]

A

`6.35`

B

`6.526`

C

`8.34`

D

`6.173`

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Knowledge Check

  • A 25.0ml sample of 0.1 M HCl is titrated with 0.1 M NaOH . What is the pH of the solution at the points where 24.9 and 25.1 ml of NaOH have been added ?

    A
    `3.70,10.70 `
    B
    ` 3.30, 10.30`
    C
    ` 3. 70 , 10 .30`
    D
    ` 3. 0, 11 . 10 `

  • A 25.0ml sample of 0.1 M HCl is titrated with 0.1 M NaOH . What is the pH of the solution at the points where 24.9 and 25.1 ml of NaOH have been added ?

    A
    `3.70,10.70 `
    B
    ` 3.30, 10.30`
    C
    ` 3. 70 , 10 .30`
    D
    ` 3. 0, 11 . 10 `

  • The volume of 0.05N Na_2CO_3 solution required to neutralise 200ml of 0.02M H_2SO_4 solution is

    A
    80 ml
    B
    140 ml
    C
    160 ml
    D
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