Download WS Solutions and Solubility

Name: __________________________________
Date: ______________
Period: ____
WS Solutions and Solubility
1. A solution consists of a _____________________ dissolved in a _________________.
2. A solution is a _________________________ mixture. (which means _______ throughout)
Is this type of mixture a pure substance? Yes or No
Explain. _______________________________
______________________________________
3. Classify the following materials as: solution (S) or heterogeneous mixture (HM) or Neither (N)
____ a. smoky air
____
f. salt water (NaCl in H2O)
____ b. sugar water (C12H22O11 in H2O)
____
g. milk
____ c. vinegar (HC2H3O2 in H2O)
____
h. soda with bubbles
____ d. oil-based paint
____
i. pure distilled water (H2O)
____ e. pure iodine (I2)
____
j. ethanol in water (C2H5OH in H2O)
4. A solution is formed by adding methanol, CH3OH, to water. Identify each of the following
intermolecular attractions as breaking or forming in the solution process: (circle answers)
breaking / forming
methanol – methanol
breaking / forming
water – water
breaking / forming
methanol – water
5. In general, the stronger the intermolecular attractions between solute and solvent molecules,
the _______________ the solubility.
6. In general, the _____________ the intermolecular attractions between solute and solute molecules,
the lower the solubility.
7. Match each term with the correct description:
nonelectrolyte
strong electrolyte
weak electrolyte
____
____
____
A. partially dissolves as ions and conducts to some extent
B. completely dissociates into ions and conducts
C. dissolves, but does not conduct
8. Define “solubility”: ___________________________________________________________________
9. Match each term with the correct description:
saturated
____
A. solution with less than the max amount of solute dissolved
supersaturated
____
B. solution with exactly the max amount of solute dissolved
unsaturated
____
C. solution with more than the max amount of solute dissolved
10. High temp. makes ______________ less soluble, but make _____________ more soluble.
11. High pressure makes _____________ more soluble, but has no effect on the solubility of ___________.
12. Why do sodas left open out of the fridge go “flat”? __________________________________________.
13. Complete the phrase that describes the types of substances that will generally dissolve in each other:
_______ dissolves _______.
Therefore, polar solvents (like water) can dissolve ___________ solutes (like alcohols, sugars,
ionic compounds, etc.).
But nonpolar solutes (like fats, oils, hydrocarbons, etc.) will dissolve in _______________ solvents.
14. List three actions you could take to make a solid dissolve better in a liquid:
____________________
____________________
____________________
15. List three actions you could take to make a gas dissolve better in a liquid:
____________________
____________________
____________________
For # 16-20, consider the graph of solubility curves below.
16. Which substance has the lowest solubility at 20oC?
__________
17. If 40 g of KCl is dissolved in 100 g of water
at 80oC, then the solution is __________________.
18. If 80 g of KNO3 is dissolved in 100 g of water
at 40oC, then the solution is __________________.
19. If 80 g of KNO3 is dissolved in 100 g of water
at 50oC, then the solution is __________________.
20. How many grams of NH4Cl can dissolve in 100 g
of water at 70oC? _______ g