Using Metals-Reactivity-2 PowerPoint PDF

5 ‘E’s Description of activity durati on Engage recalling information 5 mins Explore Lo...

5 ‘E’s Description of activity durati on Engage recalling information 5 mins Explore Looking at different chemical reaction of 5 mins metals in real life LO: Explain The reactivity series and its importance 10 min Students will explore how Elabora Specific types of chemical reactions 10 mins metals react te Students will explore the reactivity series Evaluat Critical thinking question 5 mins e Students will investigate rust Students will discover specific types of metal reactions. Reactivity of metals page 76 Check your understanding –TB Pg 75 Reactivity series of metals The reactivity series of metals is a list of metals arranged in the order of reactivity. https://www.youtube.com/watch?v=XWjQU gq2u9E https://www.youtube.com/watch?v=fJ6cDG 6Fbeo  How do metals react? Physical properties: Are measurable without change. Melting point, density, colour and malleability. Chemical properties : Change in composition or chemical change Students can elaborate on the difference between chemical change and physical change 1- Corrosion: reaction with water and oxygen? How do metals corrode? Do all metals corrode similarly Student try to write word or chemical equations? https://youtu.be/jQoE_9x37mQ  When a metal is kept in 1- Corrosion an open atmosphere it How do metals corrode? Do all metals corrode similarly? reacts with oxygen and moisture and forms a layer of metal oxides. This process is called Corrosion. The corrosion of iron is called Rusting. 2- Tarnish: is a thin layer that forms at the surface of a metal when it reacts with substances found in the air. List the substances that cause tarnish. Understand or deduce that corrosion is a type of tarnish Read and refer textbook page 77. Corrosion –book page 76 Copper turns green when corroded Rusting  Painting -The paint creates a sealed layer that prevents water and air from directly contacting the iron, which is necessary for rust to form. Protective Coatings: Some paints are formulated with anti-corrosive chemicals that offer extra protection against rust by https://www.youtube.com/watch?v=qd2B9yCKzc0 neutralizing any moisture or oxygen that may penetrate the paint layer. Investigation on rusting https://www.youtube.com/watch?v= jQoE_9x37mQ&t=20s Rust prevention: (Formative criterion D) ATL skills-Research-Finding, interpreting and evaluating information Communication - Reading, writing and using language to gather and communicate information Criterion D: Reflecting on the process of rusting- 3- Metals reacting with acids: many metals react with acids to form salt and hydrogen metal + acid → salt + hydrogen Hydrogen gas can be observed as bubbles. A lighted splint near the test-tube Observe ignites with a squeaky videos pop sound. that indicate a reaction is occurring. List material that are resistant to acid rain. Understand the effect of acid rain. https://www.youtube.com/watch?v=9hBCLoWwcWo  4- Reaction of metals with water When https://www.youtube.com/watch?v=IM8WcnkuOR0 a metal reacts with water, a metal hydroxide and hydrogen are formed. For example, sodium reacts rapidly with cold water: Sodium + water → sodium hydroxide + hydrogen 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g) In general, the more reactive the metal, the more rapid the reaction is. https://www.youtube.com/watch?v=IM8WcnkuOR0 Try It !! Watch the videos and Create a table to record your observations. https://thescienceteacher.co.uk/reactivity-of-metals/ https://www.youtube.com/watch?v=fJ6cDG6Fbeo&t=15 7s https://www.youtube.com/watch? v=IM8WcnkuOR0 Watch the above video and make a table of your observations.( 3:50) Table-1 Metal reactions with cold water Table-2 Metal reactions with hot water 5-Making electricity from metals https://www.youtube.com/watch?v=Lh-J1-6ks6g Electricity can be made when two different metals are placed in a salt solution like sodium chloride solution. Iron and copper metals can be connected with wires and placed in a salty or acidic solution. https://www.youtube.com/shorts/DnDJDK8  5-Making electricity from metals https://outu.be/jHCnYy39Oxc  ELECTROPLATING TB Pg 81 Electroplating is a process or https://youtu.be/OxhCU_jBiO type of reaction used to coat a A Copper plating- layer of metal on the surface of https://www.youtube.com/watch?v=BteRV1BJN8s another surface. There are many objects in our everyday lives that have been plated with other metals: gold- plated jewelry, nickel and copper plated coins, etc. The process involves passing an electric current through a solution of electrolytes that allows for the transfer of metal ions from the donor metal to the recipient metal. https://www.youtube.com/watch?v=FnJ0V7B7nKo Evaluating understanding Why electroplated ornaments cost less? Why will the gate not rust even though it is not painted?  Potato Battery Phosphoric acid!!!!!!!! Did you ever think that you could use a vegetable as a battery? What if you didn’t have a battery around, but had a potato? What chemical potato contains that allows it to react to the metal inserted to create https://www.wikihow.com/Create-a electricity(allow -Potato-Battery electrons to go Students are asked back the to explore and forth? site and record the steps required to create a potato battery Review Questions TB Pg 83