# Applied Notes: Unit 7A—Mixtures and Solutions

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```Name:___________________________________________ Period_________ Date_________________
Applied Notes: Unit 7A—Mixtures and Solutions
Read each note slide to find the answers to the questions. The questions go in the order of the slides.
1. Do you remember mixtures from earlier in the semester? What is a mixture and what are the
two ways we classify them?
2. What is difference between a homogeneous mixture and a heterogeneous mixture? Give an
example of each using something you eat and/or drink.
3. What is a suspension? Give an example.
4. Can a suspension be separated? Yes or No? If so, how can it be done?
5. What is a colloid? Give 2 examples. Do the substances in it separate or settle-out? Yes or No
6. What is a solution? What is an example? Can a solution be separated? Yes or No
7. Fill in the table with the correct characteristics
Suspension
Colloid
Solution
Homogeneous or
Heterogeneous
Can be separated?
Yes or No
8. What are the two parts of a solution? Define each.
9. What are two types of liquid solutions? Define each.
10. What is a concentrated solution? Name something you drink that is concentrated.
11. What is a diluted solution? Name something you drink that is diluted.
12. Complete the table with the correct response.
A Concentrated solution like a
extra strong cup of black
coffee
A Diluted solution like a cup
of coffee with lots of sugar
and milk
Amount of SOLUTE in the
solution. High or Low?
Amount of SOLVENT in the
solution. High or Low?
13. Solution concentration refers to the amount of what? Be sure to read the example as well.
14. Solutions are compared below. Decide which of the pairs is concentrated and which is diluted.
Underline the solutions that are CONCENTRATED, circle the solution that is DILUTED . Put a star
(*) next to ones that are equal.
100g of water with 5g of salt in it compared to 100g of water with 35g of salt in it
40mL of coffee with 30g of sugar in it compared to 40 mL of coffee with 0g of sugar in it
100g of water with 50g of salt in it compared to 50g of water with 25g of salt in it
10g of water with 9g of salt in it compared to 100g of water with 9g of salt in it
15. A solution that has a large amount of solute dissolved in a small amount of solvent is what:
Dilute, weak, strong or concentrated?___________________________________________
16. Do solutions only exist in the liquid phase? No! What are the 3 ways solutions can exist?
17. What is an alloy? Give an example.
18. Circle the following examples that are alloys:
Copper and zinc (a penny)
gold and copper
oxygen and nitrogen (air)
water and salt
silver and copper (sterling silver)
19. What is dissolving?
20. Is a solute dissolved by a solvent or is a solvent dissolved by a solute? Circle the correct phrase.
21. The substance that is being dissolved is the what: solute, solution, solvent?_______________
22. What does INSOLUBLE and SOLUBLE mean?
23. When oil and water are mixed, are they soluble or insoluble?________________________
24. Circle the substances that are insoluble in water:
Sugar
flour
grease
salt
alcohol
vinegar
fats
25. What is the term that describes the measurement of how much solute can be dissolved into a
solvent? In other words, what is the term that describes how much salt can be dissolved in
water at sea-level when it is 30&deg;C?___________________________________
26. Identify the 3 types of SOLUBILITY:
27. Identify the 3 types of solubility for each statement:
The most amount of solute that can dissolve in the solvent without any solute that is not
dissolved______________________________
There is space for more solute to be dissolved in the solvent_______________________
There is more solute dissolved in the solvent than is normally possible_____________________
28. Label each drawing below as unsaturated, saturated or supersaturated?
_______________
________________
__________________
29. Look at the solubility graph of “Solubility of KCL”. Using the terms from question #28, what is it
called if the point you choose is above the line___________________________
below the line_____________________ ______or on the line___________________________
30. To make hard candies like candy canes, Jolly Ranchers and lollipops, great amounts of sugar is
dissolved in water that is heated to a high temperature. When the sugary solution is cooled, it
contains more sugar in the solution than it normally can have dissolved in it at lower
temperatures. This solution is now unsaturated, saturated or supersaturated?
31. Use the graph in your notes of “Temperature-Solubility Graph for Salts” to answer question
below.
How many grams of potassium nitrate (KNO3) will dissolve in 100mL of H2O at 40&deg;C___________
How many grams of sodium nitrate (NaNO3) will dissolve in 100mL of H2O at 60&deg; C___________
According to the graph, temperature affects which of the three substances the least?_________
At 40 degrees Celsius, 100g of potassium nitrate (KNO3) dissolved in 100mL of water is
saturated, unsaturated or supersaturated?___________________________________
32. What is the term that describes the amount of time required for a solvent to dissolve in a
particular solute?_________________________________
33. What are the three factors that affect the dissolving rate of a solid into a liquid?
34. Describe how temperature affects the particles in a solid and thus affects the dissolving rate:
35. How does stirring affects the particles in a solution and thus affects the dissolving rate?
36. What are 3 ways to increase the surface area of a solid?
37. Explain how increasing the surface area affects the particles in a solution and thus affects the
dissolving rate?
38. Identify whether the following actions will increase (I) or decrease (D) the rate of dissolving of a
substance into a solution (for instance, salt or sugar dissolving in water):
Heating the substance_____ Keep the substance still_____ Tear the substance into pieces____
Stir the substance____ Crush the substance into pieces_____ Cool the substance_____
Combine substance into a larger piece_____ Cut the substance_____ Shake the solution_____
39. The solubility of gases is different than the solubility of solids and liquids. Read the table on the
solubility of gases. The complete the following:
How does decreasing the temperature of a gas affect solubility?________________
How does decreasing movement (not stirring) a gas affect solubility?_____________
How does decreasing the pressure on a gas affect solubility?_______________
What are the 3 ways to increase the solubility of a gas?
What has the greatest affect on the solubility of gases?____________________________
40. In order to increase the amount of gas dissolved in a liquid, what must be done (increase or
decrease) to the pressure__________________ and temperature____________________?
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