Differentiate between homogeneous and heterogeneous mixtures with examples.
(N/A) Homogeneous mixture:
$1$. Its constituent particles cannot be seen easily.
$2$. There are no visible boundaries of separation in a homogeneous mixture.
$3$. Its constituents cannot be easily separated.
$4$. Examples: Alloys,solution of salt in water,etc.
Heterogeneous mixture:
$1$. Its constituent particles can be seen easily.
$2$. It has visible boundaries of separation between the constituents.
$3$. Its constituents can be separated by simple physical methods.
$4$. Examples: Mixture of sand and common salt,mixture of sand and water,etc.
$1$. Its constituent particles cannot be seen easily.
$2$. There are no visible boundaries of separation in a homogeneous mixture.
$3$. Its constituents cannot be easily separated.
$4$. Examples: Alloys,solution of salt in water,etc.
Heterogeneous mixture:
$1$. Its constituent particles can be seen easily.
$2$. It has visible boundaries of separation between the constituents.
$3$. Its constituents can be separated by simple physical methods.
$4$. Examples: Mixture of sand and common salt,mixture of sand and water,etc.
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Substance Dissolved $283 \,K$ $293 \,K$ $313 \,K$ $333 \,K$ $353 \,K$ Potassium nitrate $21$ $32$ $62$ $106$ $167$ Sodium chloride $36$ $36$ $36$ $37$ $37$ Potassium chloride $35$ $35$ $40$ $46$ $54$ Ammonium chloride $24$ $37$ $41$ $55$ $66$
$(a)$ What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in $50 \,g$ 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.
| Substance Dissolved | $283 \,K$ | $293 \,K$ | $313 \,K$ | $333 \,K$ | $353 \,K$ |
| Potassium nitrate | $21$ | $32$ | $62$ | $106$ | $167$ |
| Sodium chloride | $36$ | $36$ | $36$ | $37$ | $37$ |
| Potassium chloride | $35$ | $35$ | $40$ | $46$ | $54$ |
| Ammonium chloride | $24$ | $37$ | $41$ | $55$ | $66$ |
$(a)$ What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in $50 \,g$ 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.
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$(a)$ Sodium chloride from its solution in water.
$(b)$ Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
$(c)$ Small pieces of metal in the engine oil of a car.
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$(a)$ Sodium chloride from its solution in water.
$(b)$ Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
$(c)$ Small pieces of metal in the engine oil of a car.
$(d)$ Different pigments from an extract of flower petals.
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$(a)$ Saturated solution
$(b)$ Pure substance
$(a)$ Saturated solution
$(b)$ Pure substance
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$2$. Melting of butter in a pan
$3$. Rusting of almirah
$4$. Boiling of water to form steam
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$1$. Cutting of trees
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$4$. Boiling of water to form steam
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