5/20/2023 0 Comments Chemlab 10 activities of metals![]() ![]() Needless to say, identification of the reactants in a complex reaction mixture can be very difficult, and so we will only work with chemical reactions where the reactants are known. While it may seem a trivial exercise to identify the reactants, this is not always the case. To fully describe a chemical reaction one needs to know the identities of both the products and the reactants, and the proportions in which the reactants combine and the products form. In this and the next laboratory exercise you will learn some of the basics of how chemists carry out chemical reactions and how they characterize the chemical substances involved in these reactions. Even though we know a great deal about chemical reactions, chemists are still finding new chemical reactions and new ways of assembling atoms into molecules and molecules into more elaborate structures. As we have discussed in class, there are rules, such as the Law of Conservation of Mass, by which chemical reactions occur, and it took chemists a long time to understand these basic rules. One of chemistry’s goals is to be able to transform any set of substances (the reactants) to another set of substances (the products) through a chemical reaction. Now repeat steps 1-7 for the next three metals (Cu, Zn and Ag).Authors: D. (Hint: these are single replacement reactions)Ĩ. In table 2, write the balanced equations for the reactions that occured. In data table 1, if a reaction occurred, write "reaction." If no reaction occurs write "no reaction".ħ. Click on each beaker to see the "molecular scale"Ħ. ![]() /classroom-resources/metals-in-aqueous-solutions-simulationĥ. Click on the link below or copy and paste it into your browser. To practice using the activity series chart in your reference tableġ. To practice writing single replacement reactions Based on Equation 1, aluminum is more active than copper and therefore replaces the copper (this is called a single replacement reaction). The more active metal forms a new compound containing metal cations. In general, the activity of a metal may be defined as follows:Īn active metal will react with a compound of a less active metal, which is converted to its “free element” form. A more active metal always replaces the ion of a less active metal. ![]() Single replacement reactions will occur spontaneously in one direction only (compare Equations 1 and 2). The reaction of aluminum with copper (II) chloride (Equation 1) is classified as a single replacement reaction – aluminum reacts with and “replaces” copper ions in copper (II) chloride. Consider equation 1 and 2 below:ĢAl (s) + 3CuCl 2(aq) -> 2AlCl 3(aq) + 3Cu (s) (Equation 1)Ĭu (s) + AlCl 3(aq) -> No Reaction (Equation 2) To determine the activity of metals you can compare the reactions of metals with different ![]() How can we determine the relative reactivity of different metals? Gold is a highly valuable jewelry metal because it is essentially unreactive. Copper is used in electrical wiring because it conducts electricity extremely well and resists corrosion better than many metals. Although iron is the most common metal used in manufacturing, it must be protected againstĬorrosion because rusts easily. The usefulness of metals in structural and other applications depends on their physical and chemical ![]()
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