128 Views

Download Presentation
##### Units of Concentration

**An Image/Link below is provided (as is) to download presentation**

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -

**Units of Concentration**Bio Sciences; Chemicals**Bellwork**What is a homogeneous solution? A homogeneous solution has the same uniform appearance and composition throughout, specifically only one phase present.**Objectives**1. Recall the parts of a solution 2. Explain what concentration means 3. Give example of where concentration units are used 4. List common concentration units used in a lab 5. Differentiate between the various concentration units**Terminology**Concentration: The amount of substance in a defined space or volume Percent w/w: Grams of solute divided by ml of total solution Percent w/v: Milliliters of solute divided by ml of total solution Percent v/v: Grams of solute divided by grams of total solution Molarity: Mole of solute divided by liters of solution Molality: moles of solute divided by kilograms of solvent Normality: Is a multiple of molarity or a gram equivalent weight of a solute per liter of solution Parts per Million: One milligram (mg) per liter of water or kilogram of something. Parts per Billion: One micro gram ( g) per liter of water or kilogram of something.**Solutions Recap**What are the components of a solution Solvent Solute**Concentration**Concentration: The amount of substance in a defined space or volume Defined space or volume Amount of substance**Where Are Concentration Units**Where might you find concentration units; I need at least three (3) examples?**Common Concentration Units: Percent**Percent (%). The mass/ volume of one components divided by the total mass/ volume w/v: Grams of solute divided by ml of total solution v/v: Milliliters of solute divided by ml of total solution w/w: Grams of solute divided by grams of total solution**Common Concentration Units: Molarity**Specific number of particles**Common Concentration Units: Molarity cont.**What is the molarity of a 100ml solution made from 3.0g of NaOH?**Compare**What is a similarity and a difference between Molarity and Molality?**Common Concentration Units: Normality**Normality (N): Is a multiple of molarity either 1, 2, 3, 4, 5, etc. Or a gram equivalent weight of a solute per liter of solution Take 1N HCl: 1N means 1 molecule of H+ of Cl- per molecule of HCl Take 2N H2SO4: 2N means 2 molecules of H+ per molecule of H2SO4**Closure**Letter or Note to a Friend Write a letter or a note to a friend explaining the difference between three (3) types of the concentration units we learned in the lesson.