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Which may be added to one litre of water...

Which may be added to one litre of water to act a buffer?

A

One mole of `CH_(3)COOH` and one mole of `HCl`

B

One mole of `NH(4)OH` and one mole of `NaOH`.

C

One mole of `NH_(4)Cl` and one mole of `HCl`

D

One mole of `CH_(3)COOH`and `0.5`mole of `NaOH`.

Text Solution

Verified by Experts

`HC_(2)H_(3)O_(2)+NaOH+C_(2)H_(2)O_(2)Na+H_(2)O`
`{:(n_(i),1,0.5,0,0),(n_(f),0.5,0,0.5,0.5):}`
This solution contain weak acid & its salt with strong base and thus acts as buffer.
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The number of moles of an acid or base added to one litre of the buffer solution so as to change its pH by one unit is called............of the buffer.

When 0.5 mole of NaOH was added to one litre of a buffer solution, its pH changed 5.70 to 5.85. Find the buffer capacity.

Knowledge Check

  • Which may be added to one litre of water to act as a buffer

    A
    One mole of `HC_(2)H_(3)O_(2)` and 0.5 mole of NaOH
    B
    One mole of `NH_(4)Cl` and one mole of HCl
    C
    One mole of `NH_(4)OH` and one mole of NaOH
    D
    One mole of `HC_(2)H_(3)O_(2)` and one mole of HCl

  • What weight of NaCl is added to one litre of water so that Delta"T"//"K"_("f")=1/500?

    A
    5.85g
    B
    0.585g
    C
    0.0585g
    D
    0.0855g

  • 2 g of sugar is added to one litre of water to give sugar solution. What is the effect of addition of sugar on the boiling point and freezing point of water ?

    A
    Both boiling point and freezing point increase
    B
    Both boiling point and freezing point decrease
    C
    Boiling point increases and freezing point decreases
    D
    Boiling point decreases and freezing point increases.

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