Solutions Pre-Test
Authored by Shannon Oliver
Chemistry
9th - 12th Grade
Used 3+ times
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22 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the solubility of 55g of Sodium Nitrate (NaNO3) dissolved in 100g of water at 35 degrees Celsius?
unsaturated
saturated
supersaturated
insoluble
Answer explanation
At 35 degrees Celsius, 55g of Sodium Nitrate dissolved in 100g of water is unsaturated because when you look at the solubility curve, that point is under the line.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A solution containing 90g of HCl in 100g of water at at 10 degrees Celsius would be described as-
insoluble
unsaturated
saturated
supersaturated
Answer explanation
At 10 degrees Celsius, 90g of HCl dissolved in 100g of water is supersaturated because when you look at the solubility curve, that point is above the line.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A solution containing 80g of Potassium Nitrate (KNO3) in 100g of water at at 60 degrees Celsius would be described as-
supersaturated
unsaturated
insoluble
saturated
Answer explanation
At 60 degrees Celsius, 80g of Potassium Nitrate dissolved in 100g of water is unsaturated because when you look at the solubility curve, that point is below the line.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
At what temperature would 50g of Potassium Nitrate (KNO3) in 100g of water make a saturated solution?
60 degrees Celsius
30 degrees Celsius
42 degrees Celsius
50 degrees Celsius
Answer explanation
At 30 degrees Celsius, 50g of Potassium Nitrate dissolved in 100g of water is saturated because the point is on the line.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following affect the rate at which a solid dissolves in water? (select ALL that apply)
Heating up the water
Agitation or Stirring
The size of the solid
Increasing the pressure
Answer explanation
Increasing the pressure only increases the rate at which GASES dissolve, not solids.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In the equation above, which of the following will be the precipitate (insoluble solid) of the reaction?
Answer explanation
Looking at the Solubility rules to the left, Cl is soluble in water UNLESS it forms a compound with Ag.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Water is described as being a universal solvent because it is
massive
nonpolar
clear
polar
Answer explanation
Water molecules are polar. They have a bent shape giving it partial charges to each end. The hydrogen atom is partially positive and the oxygen end partially negative.
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