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Solubility of KNO(3)at 313 K is 62 g. Wh...

Solubility of `KNO_(3)`at 313 K is 62 g. What mass of `KNO_(3)` would be needed to produce a saturated solution of `KNO_(3)` in 50 g of water at 313 K ?

Text Solution

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By definition of a saturated solution.
100 g of water at 313 k contain `KNO_(3) = 62 g`
50 g of water at 313 K contain `KNO_(3) = 31 g`
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Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). (a) What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K ? (b) Pragya makes a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would she observe as the solution cools ? Explain. (c ) Find the solubility of each salt at 293 K . Which salt has the highest solubility at this temperature ? (d) What is the effect of change of temperature on the solubility of a salt ?

Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K?

Knowledge Check

  • Saturated solution of KNO_(3) is used to make salt bridge because:

    A
    velocity of `K^(+)` is greater than that of `NO_(3)^(-)`
    B
    velocity of `NO_(3)^(-)` is greater than that of `K^(+)`
    C
    velocity of both `K^(+)` and `NO_(3)^(-)` are nearly the same
    D
    `KNO_(3)` is higly soluble in water

  • Saturated solution of KNO_(3) is ued to make 'salt - bridge' because ,

    A
    Velocity of `K^(+)` is greater than that of `No_(3)^(-)`
    B
    Vlocity of `NO_(3)^(-)` is greater than that of `K(+)`
    C
    Similar mobilities of the cation and anion diminish the liquid junction potential
    D
    `KNO_(3)` is insoluble in water.

  • Saturated solution of KNO_(3) is used to make 'salt-bridge' because

    A
    Velocity of `K^(+)` is greater than that of `NO_(3)^(-)`
    B
    Velocity of `NO_(3)^(-)` is greater than that of `K^(+)`
    C
    Velocities of both `K^(+) and NO_(3)^(-)` are nearly the same
    D
    `KNO_(3)` is highly soluble in water

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