10th grade Saturated, unsaturated and supersaturated solutions worksheet

Saturated, unsaturated and supersaturated solutions

Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Sugar dissolves up to 200 g per 100 mL of water at 25 °C. What is the most that dissolves in 75 mL of water at 25 °C, Jun?
2. 2.

   Baking soda's limit is 12.7 g per 100 g of water at 40 °C. A solution at 40 °C holds 10.0 g per 100 g. Which is it, Kira?

   • Saturated
   • Supersaturated
   • Unsaturated
3. 3.

   Baking soda's limit is 9.6 g per 100 g of water at 20 °C. A solution at 20 °C holds 9.6 g per 100 g. Which is it, Luz?

   • Supersaturated
   • Saturated
   • Unsaturated
4. 4.

   Baking soda's limit is 8.2 g per 100 g at 10 °C. A slowly cooled, clear solution at 10 °C holds 11.0 g per 100 g. Which is it, Milo?

   • Supersaturated
   • Unsaturated
   • Saturated
5. 5.

   A saturated baking soda solution at 60 °C (16.5 g per 100 g) cools to 20 °C (9.6 g). What usually happens, Noah?

   • More baking soda dissolves as the water cools
   • Nothing, since the solid stays dissolved as it cools
   • About 6.9 g per 100 g of water crystallizes out
6. 6.

   Why do crystals often form when a hot saturated solution cools, Pia?

   • Most solids dissolve less when cold, so the extra comes out
   • The water itself freezes into crystals
   • Cold water dissolves more, which pushes the old crystals out of it
7. 7.

   A saturated salt solution warms from 25 °C to 60 °C. What happens to how much salt it can hold, Ren?

   • It can hold less, so salt crystallizes out of it as it warms up
   • It turns supersaturated as it warms
   • It can hold a little more, so it becomes slightly unsaturated
8. 8.

   How is a supersaturated solution usually reached, Tala?

   • By leaving undissolved crystals sitting on the bottom
   • By cooling a hot saturated solution gently, with no crystals
   • By stirring extra solid into a cup of cold water
9. 9.

   A clear supersaturated solution fills with crystals when the cup is tapped. Why, Zee?

   • The solution was unsaturated, so it could hold no more solute
   • The tap adds more solute to the cup from the air
   • The tap starts crystals, and the extra solute comes out
10. 10.

    After crystals form in a supersaturated solution, what is the liquid left behind, Ari?

    • Pure water, with no solute left in it
    • Still supersaturated, with the same extra solute dissolved
    • Saturated: it holds the most that can dissolve