Types Of Mixtures Lab
Types of Mixtures Lab
Purpose
• To classify types of mixtures
• To determine the polarity of substances
Background Information: Polarity In the middle of the night of March 24, 1989, the giant oil tanker Exxon Valdez veered out of the shipping lanes in Alaska’s Prince William Sound and struck a reef. The side of the tanker was ripped open, and 11 million gallons of crude oil flowed out into Alaska’s clear blue waters. Because petroleum oil is insoluble (does not dissolve) in water and less dense, it quickly spread across the surface. The oil slick eventually covered 10,000 square miles, contaminating 1500 miles of shoreline, and causing substantial damage to wildlife, the fishing industry, and the marine environment. Chemists say “like dissolves like,” meaning that polar solvents tend …show more content…
(2) Which of the mixtures were heterogeneous? Homogeneous?
(3) Which of the mixtures were suspensions? Colloids? Solutions?
(4) What substance was the solvent in the solutions you created?
(5) In each of the suspensions created, identify which substance was least dense and explain how you know this.
(6) Is water polar or nonpolar? Which of the tested substances are polar, and which are nonpolar? How do you know?
(7) What type of polarity must “sunblock” lotion have if it is “waterproof” (doesn’t wash off when you go swimming)? Explain your answer.
Analysis and Conclusions: Use Complete Sentences!
|Type of Mixture |Heterogeneous or Homogeneous? |Separate After Standing? |Tyndall Effect? |
|Solution |Homogeneous |No |No |
|Suspension |Heterogeneous |Yes |Yes
Purpose
• To classify types of mixtures
• To determine the polarity of substances
Background Information: Polarity In the middle of the night of March 24, 1989, the giant oil tanker Exxon Valdez veered out of the shipping lanes in Alaska’s Prince William Sound and struck a reef. The side of the tanker was ripped open, and 11 million gallons of crude oil flowed out into Alaska’s clear blue waters. Because petroleum oil is insoluble (does not dissolve) in water and less dense, it quickly spread across the surface. The oil slick eventually covered 10,000 square miles, contaminating 1500 miles of shoreline, and causing substantial damage to wildlife, the fishing industry, and the marine environment. Chemists say “like dissolves like,” meaning that polar solvents tend …show more content…
(2) Which of the mixtures were heterogeneous? Homogeneous?
(3) Which of the mixtures were suspensions? Colloids? Solutions?
(4) What substance was the solvent in the solutions you created?
(5) In each of the suspensions created, identify which substance was least dense and explain how you know this.
(6) Is water polar or nonpolar? Which of the tested substances are polar, and which are nonpolar? How do you know?
(7) What type of polarity must “sunblock” lotion have if it is “waterproof” (doesn’t wash off when you go swimming)? Explain your answer.
Analysis and Conclusions: Use Complete Sentences!
|Type of Mixture |Heterogeneous or Homogeneous? |Separate After Standing? |Tyndall Effect? |
|Solution |Homogeneous |No |No |
|Suspension |Heterogeneous |Yes |Yes