This pair of experiments forms an important stage for younger students in developing an understanding of what an acid is. Be very careful not to knock the tripod supporting the basin.
In Lesson 2, selecting zinc and sulfuric acid as the example to follow through to producing crystals of the salt is governed by the need to have a salt that crystallises easily. Choose one of the metals that reacts rapidly with the acids, and in a clean test-tube add a piece of this metal to a 2—3 cm depth of one of the acids.
For this experiment, the four metal powders given are magnesium, zinc, aluminium and iron. For example, gas formations, bubbles, fizzy, or color change. The acid is now used up. The same applies to moving the evaporating basin before pouring its contents into the crystallising dish.
When the total energy given out is more than the energy used, the reaction is exothermic and its product is a very stable compound. If crystals begin to appear, e. Metals higher on the activity series are more likely to reacts relative to those lower on the activity series.
Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Safety is particularly relevant to younger students.
Metals will give up electrons to become positively charged ions, called cations. The rise in temperature for each of the metal powders to be used is shown after a period of 2 minutes for each reaction.
The activity series can be used to predict products of reactions, and to predict if a reaction will even occur. The chemical equations for the reactions that will take place are as follows: Carefully remove the beaker of acid from the tripod as instructed by your teacher, and stand it on the heat resistant mat.
There is potential for producing hazardous fumes if classes are allowed to over-evaporate salt solutions, either from evaporation of any excess sulfuric acid or from decomposition of the salt.
If nothing happens, you may need to try again. When an atom gains electrons, it is reduced. Turn off the Bunsen burner before the solution boils.
Introduction Reactions may or may not occur between two elements based on the activity series. Be aware of the problems associated with heating beakers or evaporating dishes on tripods, and with lifting such hot containers off a tripod after heating.
Teaching notes student sheet available with this resource and get the students to work each question after observing the reaction. When an atom loses its electrons, it is oxidized.
In this experiment, different metals were tested for their reactivity. If small crystals form on the glass rod, stop heating, otherwise continue until that point is reached.
If older students perform these experiments, they can be asked to write symbol equations: When an unstable compound is broken, not much energy is used up and thus it is expected that all four reactions will be exothermic.Lab: Reactivity with Metals Purpose: The purpose of this lab is to determine the reactivity of various metals with water as well as potentially acid and be able to.
The purpose of this lab was to test the reactivity of certain metals, then create an activity series demonstrating the metals’ tendencies to be oxidized.
Solid metal was placed in a metal ion solution to determine if a reaction would occur. Choose one of the metals that reacts rapidly with the acids, and in a clean test-tube add a piece of this metal to a 2–3 cm depth of one of the acids.
This time place a cork loosely in the top of the test-tube so that any gas produced escapes slowly. Therefore in this reaction, a more reactive metal will displace the metal ion in the compound and thus it will be separated.
When a displacement reaction occurs, heat energy is given out which means that the reaction is exothermic. I cobbled this lab together from common reactions to focus in on element to ion reactions. This is a difficult concept for students to grasp, so providing some concrete visuals is helpful.
To help students connect the lab reactions to the content, they will record all their data and conclusions in each part of the experiment. View Lab Report - Reactivity of Metals Lab from SCH 4U at Canterbury High School, Ottawa.
Reactions between water and 6 elements By: Emily Prieur Lab Partner: Katherine Ross Presented to: Mr. Smith.Download