Solutions Notesheet Applied Chemistry Name ______________________________ Date _______________ Period _________ I. Background A. A solution is a _________________________that has different substances dissolved in it that cannot be seen. This results in a ___________________ physical state. i. Solute: _____________________________________ - ii. present in _________________________ amount Solvent: _____________________________________ - present in _________________________ amount iii. Properties of Solutions 1. ____________________________________________________________________ 2. ____________________________________________________________________ 3. ____________________________________________________________________ 4. ____________________________________________________________________ Soluble means something ________ be dissolved in something else. Insoluble means something ___________ be dissolved in something else. Dissolving a solid in a liquid can affect the _______________ point and _______________ point. This is called a ___________________________. II. Types of Solutions A. Solid Solutions Alloys: ______________________________________________________ _______________________________________________________ Advantages of alloys over pure metals: B. Gaseous Solutions Example: C. Liquid Solutions Miscible liquids: Immiscible liquids: 1 1. Aqueous Solutions: Solutions with _____________ as the solvent. Because water can dissolve so many things, it is called the ___________________ _____________________________. Electrolyte – a solution that ____________________________. 2. Tincture: Solutions with ______________ as the solvent. 3. A saline solution is a solution of ________________ and ________________. The solute is _________________. The solvent is __________________. 4. A dilute solution is a solution with ___________________________________. 5. A concentrated solution is a solution with ______________________________. III. Concentration A. Definition: Concentration is ______________________________________________ B. Types 1. % Concentration = mass of solute x 100 mass of solution Usually used for ____________________ solutions. Example 1: A saline solution is prepared by mixing 3 grams of salt with 97 grams of water. Calculate the % concentration of the saline solution. Mass of solute: Mass of solvent: Mass of solution: % concentration = Dilution: ___________________________________________________________________ 2 Example 2: A sugar solution is made using 25 grams of sugar with 45 grams of water. Calculate the % concentration of the sugar solution. Mass of solute: Mass of solvent: Mass of solution: % concentration = Example 3: Kool-aid is prepared by mixing 33 grams of Kool-aid with 99 grams of water. Calculate the % concentration of the Kool-aid solution. % concentration = Example 4: Calculate the % concentration of 16 g of salt in 120 g of saline solution. % concentration = Which is the most concentrated? __________________________ Which is the most dilute? __________________________ 3 2. Parts per Million (ppm) a. Usually used with _____________________ solutions. b. Which is larger? (circle) Number One hundred Or One thousand One hundredth Or One thousandth One million Or One billion One millionth Or One Billionth Looks Like Number Looks Like Number Looks Like Number Looks Like Abbreviation 3. Sea water is a _______% solution. Means: ______ grams of salt to _______ grams sea water or ______ parts salt to ______ parts sea water Looks like: _____________________ dilution (as a fraction) 4. Food coloring is a 10% aqueous solution. Means: _____ grams of pigment to _______ grams of solution or _____ parts pigment to ______ parts solution Looks like: _________ dilution or _________ dilution 4 Example Problems: The following serial dilutions were performed. Write the dilution fraction in each well. a. 1-to-4 dilution of a 10% solution b. 1-to-2 dilution of a 20% solution. c. 1-5 dilution of a pure substance. 5. Other examples of parts per million 1 ppm means 1 second in ______ days of your life 1 ppm means 1 penny in ___________. 1 ppm means one inch in __________ miles. 5 IV. Solubility and the Dissolving Process A. Solubility is a _____________________ property that gives the ___________ of solute that will dissolve in a solvent (usually water) at a given _______________ and pressure. B. Saturated: A solution is saturated if it contains as much ______________ as can possibly be dissolved under existing conditions of _____________________ and _____________________. C. Unsaturated: Has __________ than the maximum amount that can be dissolved. D. Supersaturated: Has _________ than the maximum amount that can be dissolved. E. 3 Factors Affecting the Rate of Dissolving 1. Surface Area: increases the number of ____________________ between the ______________ and ______________ Example: 2. Stirring: increases the number of ____________________ between the ______________ and ______________ Example: 3. Temperature: increases the ____________________ between the ______________ and ______________ Example: 6