Weekly Warm Up What is a mixture? What are the two types of mixtures?

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Presentation transcript:

Weekly Warm Up What is a mixture? What are the two types of mixtures? What is a solution? Give an example of a solution. A substance made up of two or more substances that can be easily separated by physical means. Homogeneous Heterogeneous A homogenous mixture contains two or more substances blended uniformly. (evenly throughout ie. Looks the same) Salt water, vanilla ice cream, brass, air

Solutions IPC - Chapter 21

What makes solutions so special? The ocean is a solution. Our cells are made of solutions. Some flavorful foods we love are tasty because of solutions. Solutions have properties that are different from their separate parts…

Is a glass of ice water a solution? Why or why not? Discuss with your neighbor.

What are solutions? A solution is…a _____________ mixture composed of a _______ and one ______ or many solutes. The solvent is the substance present in the greatest amount. It does the dissolving. The solute is the substance there is less of. It is dissolved. A ________ can exist as a solid, liquid or gas. Air (g) is a solution. Steel (s) is a solution called an _____. homogeneous solvent solute solution alloy

These are solutions:

Can anything make a solution? Soluble _______ – describes a solute that can be dissolved into a solvent. Ex: Salt is soluble in water. _________ – describes a substance that cannot be dissolved by a solvent. Ex: Sand is insoluble in water. What about two liquids? ________ – two liquids that are soluble in each other. Ex: Water and alcohol ___. __________ – two liquids that do not mix. Ex: Oil and water are immiscible. Insoluble Miscible mix Immiscible

How do things dissolve? physical Dissolving is a ________ process. Cation (+) & Anion (-) physical Dissolving is a ________ process. Polar solvents can “pull” the ions in an ionic compound apart. For covalent molecules, intermolecular forces are disrupted by the solvent. “Like dissolves like” The process of solute particles being surrounded by solvent particles is called ____________. Water is the _________ _______! Metal & NM NM only SOLVATION universal solvent

http://www.youtube.com/watch?feature=player_detailpage&v=EBfGcTAJFo

Factors that affect the RATE of solvation: (Surface Area) Particle Size The _______ the solute particles are, the _____ they will dissolve. Shaken…or stirred _________, shaking or stirring, of the solution __________ the rate of solvation. Temperature The _______ the ______ ______ of the solvent particles, the _______ it can dissolve a solute. smaller faster Agitation increases (measure of kinetic energy) higher kinetic energy faster

Warm-Up: Self Test #1 of 5

Self-Test #1 Answer: F Self-Test #2 Answer: B Oxygen is partially negative Self-Test #2 Answer: B Concept: aqueous solutions are more dense than water

Rate of Solvation – TAKS Questions

Answers: Rate of Solvation 3. Question #10 Answer: J 4. Questions #16 Answer: F 5. Question #17 Answer: A http://water.org/news/lesson-plans/

Weekly Warm Up What is a solute? What is a solvent? What factors increase solvation? Intro: https://www.youtube.com/watch?v=RMqsvJeN8b8 The substance(s) that are being dissolved; least amount. The substance that is dissolving; greatest amount. Size of solute Stir, mix, shake = Increase Temperature (i.e. Surface area) Agitate

Gas Solubility Lab: https://www.youtube.com/watch?v=K3j9HAsoV5Q Acidic Solution via Dry Ice (CO2) Demo https://www.youtube.com/watch?v=Pu_OhvLwcaU