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The concentration of solutions is someti...

The concentration of solutions is sometimes expressed in terms of percentage of mass or volume precent in total mass or volume of the solution. When nothing is mentioned, it satnds for

A

mass percent

B

volume percent

C

mass by volume percent

D

volume by mass percent

Text Solution

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The correct Answer is:
1
In case of a solid dissolved in a liquid, the percentage by mass means the mass of the solute in grams present in 100 g of the solution, i.e., it is `weight//weight (w//w)` and percentage by volume means the mass of the solute dissolved in `100 mL` or `100 cm^(3)` of the solution i.e., it is `weight//volume (w//v)`.
In case of a liquid dissolved in another liquid, percentage by mass has the same meaning but percentage by volume means the volume of the liquid solute in `cm^(3)` present in `100 cm^(3)` of the solution, i.e., it is `volume//volume (w//v)`.
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Knowledge Check

  • The concentration of the solution containing 40 gram of common salt in 320 gram of water in terms of mass by mass percentage of solution is

    A
    `1.11%`
    B
    `11.01%`
    C
    `11.1%`
    D
    `10.11%`

  • Assertion: The concentration of pollutants in water or atmosphere is often expressed in terms of ppm Reason :Concentration in parts per million can be expressed as mass to mass, volume of volume and mass to volume .

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Strength of the sample of H_(2)O_(2) is generally expressed in terms of volume strength . It means the volume of oxygen liberated at NTP by heating one volume of H_(2)O_(2) . The concentration of H_(2)O_(2) in a solution can also expressed as percentage of H_(2)O_(2) in solution . Normality of this solution can be calculated if the equivalent mass of H_(2) O_(2) is known . Percentage strength of the above H_(2)O_(2) solution is

    A
    `0.126`
    B
    `0.272`
    C
    `0.544`
    D
    `0.136`