The Solution to Solutions Chemistry 2008
Content Objectives Chemistry swbat define various terms associated with solutions by viewing a PowerPoint and filling in cloze style notes. Chemistry students wbat describe the factors affecting solution preparation.
Language Objective You will match solution opposites and definitions by sorting terms in pairs. SW discuss the difference between a saturated and unsaturated solution by doing Saturated or Not web activity in pairs.
What is a solution? A homogenous mixture of 2 or more substances in a single phase. http://universe-review.ca/i12-18- solution.jpg
Solute The solid, liquid or gas being dissolved. Usually present in small amounts.
Solvent The liquid or medium which the solute is dissolved in. Water is the universal solvent.
Concentrated versus Dilute A concentrated solution has a HIGH amount of solute. A dilute solution has a relatively LOW amount of solute.
Is it Unsaturated, Saturated or Supersaturated? Unsaturated: If the concentration of solute is lower than the solubility limit. Saturated: A solution that can exist at equilibrium with visible undissolved solute. Supersaturated: When the concentration of solute is greater than the normal solubility limit. (usually requires heating and stirring).
Find a partner Saturated or Not Get a laptop log in: PCHSlaptop Password: PClaptopsHS Go to: http://www.wwnorton.com/college/chemistry/gilbert2/ tutorials/interface.asp? chapter=chapter_04&folder=saturated_solutions Do the activity answer the questions. Turn in your paper, and return the laptop.
Miscible versus Immiscible If 2 liquids dissolve in each other Do not separate over time Example: Alcohol and water
Miscible versus Immiscible http://img.webmd.com/dtmcms/live/webmd/consumer_assets/ site_images/articles/health_tools/skinny_sipping_slideshow/ photolibrary_rm_photo_of_energy_drinks.jpg
Miscible versus Immiscible If 2 liquids dissolve in each other Do not separate over time Example: Alcohol and water If the 2 liquids are insoluble Forms layers and separates Examples: Oil and Water Vinegar and Oil
Miscible versus Immiscible http://img.webmd.com/dtmcms/live/webmd/consumer_assets/ site_images/articles/health_tools/skinny_sipping_slideshow/ photolibrary_rm_photo_of_energy_drinks.jpg
Electrolyte vs. Nonelectrolyte A substance containing free ions (like an ionic solution) Can conduct electricity Solutions of acids, bases or salts. Substances that dissolve in water but contain NO ions. Do not conduct electricity Can either be a polar or non-polar molecule. http://antoine.frostburg.edu/chem/senese/101/ reactions/faq/are-nonelectrolytes-nonpolar.shtml
Factors that AFFECT solution formation 1. Surface area of solvent (smaller dissolves faster) 2. Still versus stirring (stirring prevents concentration gradients which slows formation) 3. Increasing temperature ( faster the molecules move the process speeds up)
Solubility How much of the solute can be dissolved into the solvent. Usually expressed in the number of grams of solute in 100g of solvent.
Factors that AFFECT Solubility 1. Strength of intermolecular forces within the solute and solvent and between the solute and solvent. 2. The solubility of a gas in a liquid is directly proportional to the partial pressure of a solute gas over the liquid solvent. 3. Temperature.
Content Objectives Chemistry swbat define various terms associated with solutions by viewing a PowerPoint and filling in cloze style notes. Chemistry students wbat describe the factors affecting solution preparation.
Language Objective You will match solution opposites and definitions by sorting terms in pairs. SW discuss the difference between a saturated and unsaturated solution by doing Saturated or Not web activity in pairs.
So answer the following How is a saturated solution different from an unsaturated solution?