January 26, 2016 Learning Target: I will organize metals according to their reactivity with acid. Quiz on Wednesday (Elements, Compounds, & Reactions)

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January 26, 2016 Learning Target: I will organize metals according to their reactivity with acid. Quiz on Wednesday (Elements, Compounds, & Reactions) Entry Task: Read “A Brief History of Salt” pg Salt has long been used in the preservation of meats. What properties of salt do you think makes it a good preservative? Agenda: Lesson 10.1 – Chem. Reactions w/Metals 1.Complete/Review/Turn in Quiz Review

Order of Reactivity List the metals in order of reactivity starting with the least reactive. For each metal state the evidence (observations) that led to your decision.

Order of Reactivity 1.Copper – Very small bubbles – no temp change 2.Zinc – slow constant bubbles – temp change +2° 3.Iron – Constant bubbles – Temp change +3° 4.Magnesium – Fast, hard bubbling, hear hissing sound – temp change +13°

Chemical Equations Acid used: HCl (Hydrochloric Acid) IronFe + HCl FeCl3 + H2 Copper Cu + HCl CuCl2 + H2 ZincZn + HCl ZnCl2 + H2 Magnesium Mg + HCl MgCl2 + H2

Reaction Definitions Exothermic A chemical reaction where heat is produced. (temp goes up) Endothermic A chemical reaction where heat is used during the reaction. (temp goes down)