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25.3 g of sodium carbonate, Na(2)CO(3) i...

25.3 g of sodium carbonate, `Na_(2)CO_(3)` is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, `Na^(+)` and carbonate ions, `CO_(3)^(2-)` are respectively (Molar mass of `NaCO_(3)=106g mol^(-1)`)

A

0.477 M and 0.477 M

B

0.955 M and 1.910 M

C

1.910 M and 0.955 M

D

1.90 M and 1.910 M

Text Solution

Verified by Experts

The correct Answer is:
C
Molarity of the solution `= (25.3)/(106)xx(1000)/(250)`
`=0.955M`.
`Na_(2)CO_(3)to2Na^(+)+CO_(3)(2-)`
`[Na^(+)] = 2xx0.9555M=1.910M`
`[CO_(3)^(2-)] = 0.955M`
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Knowledge Check

  • 25.3 g of sodium carbonate, Na_2CO_3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, Na^(+) and carbonate ions, CO_(3)^(2-) are respectively (Molar mass of Na_2 CO_3 = 106 g mol^(-1) )

    A
    0.955 M and 1.910 M
    B
    1.910 M and 0.955 M
    C
    1.90 M and 1.910 M
    D
    0.477 M and 0.477 M

  • 25.3 g of sodium carbonate, Na_(2)CO_(3) is dissolved in enough water to make 250 mL of solution. If sodium carbonate completely, molar concentration of sodium ions, Na^(+) and carbonate ions, CO_(3)^(2-) are respectively (Molar mass of Na_(2)CO_(3)=106g mol^(-1))

    A
    0.477 M and 0.477 M
    B
    0.955 M and 1.910 M
    C
    1.910 M and 0.955 M
    D
    1.90 M and 1.910 M

  • 25.3 g sodium carbonate, Na_(2)CO_(3) , was dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of Na^(+) and carbonate ions are respectively:

    A
    (a)`0.9555 M and 1.910 M`
    B
    (b)`1.910 M and 0.955 M`
    C
    (c )`1.90 M and 1.090 M`
    D
    (d)`0.477 M and 0.477 M`

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