Chemistry – Sept 28, 2018 Do Now – List three physical properties of an apple and one chemical property. Get out the PP/CP and PC/CC Worksheet for Hmk.

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Chemistry – Sept 28, 2018 Do Now – List three physical properties of an apple and one chemical property. Get out the PP/CP and PC/CC Worksheet for Hmk check

Objectives and Agenda Objectives Agenda Homework Review To learn about Separation methods To plan to separate a sample of sand, salt, iron filings and poppies Assignment: Prelab for Separation Lab Agenda Homework Review Separation Methods Separation Lab Prelab Prelab hints

Mechanical Means of Separation Decantation (separates a solid from a liquid or two liquids based on density) Filtration (separates a solid from a liquid based on particle size) Centrifugation (separates a solid from a liquid or two liquids based on density) Distillation (separates two liquids based on boiling point) Chromatography (separates any two substances based on affinity for a support substance)

Separation Lab Prelab On Tuesday we will do our second real lab with a modified lab report this time. It is a separation mystery for you to solve. For the Prelab: Prepare 1) A flowchart for your separation strategy 2) A procedure to accomplish this separation strategy (what will you do first, second….) 3) A data table to collect all necessary data for the needed calculations. (Or at least an area to collect data as you work.)

Separation Lab overview Given a mixture of Sand, Salt, Poppy Seeds and Iron Filings, design and execute a separation method. Write a proposed procedure to start. (Prelab) When executing your procedure, record every action you take in the order you do them to create the real procedure that you used. Separate, dry and weight each of the four substances. Determine the percent composition of each of the four substances in the mixture. Determine the percent recovery of matter from the mixture.

Prelab Hints Iron is magnetic but none of the others are Salt dissolves in water but none of the others do In water, poppies float, but iron and sand sink Don’t add water until you really want to, and use a limited amount, because you’ll just have to boil it away later.

Exit Slip - Homework Exit Slip: What method would you use to separate an oil and water mixture? What physical property does this method exploit? (Hint: There’s more than one correct answer.) What’s Due? (Pending assignments to complete.) Element quiz Tuesday Perform Separation Lab on Tuesday What’s Next? (How to prepare for the next day) Separation Lab day