This is when one element trades places with another element in a compound. If too much time elapses, the precipitates settle so much that differences in amount of precipitate related to height are difficult to observe. The reason for the experiment not following the exactly correct pattern could be: Not all the zinc reacted with the copper. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Predicted Type s of Reaction : Double-displacement reaction Observations of Products : Lead iodide is in solid state and potassium nitrate in aqueous state.
Also ,the Copper Sulphate has to be in Aqueous State ,dissolved in water in order for the reaction to occur , so in order to get the Dry sample Anhydrous Salt , You will have to use Evaporation To Dryness , if not , Crystallisation to get the Hydrated Copper Sulphate Crystals. The copper sulfide takes considerable time to settle. When the copper wire is added to the solution of silver nitrate the copper wire begins to disappear and overtime white solid is formed on the copper wire. In contrast, if we immerse a copper strip in a zinc sulfate solution, no reaction will occur because the reverse reaction is highly nonspontaneous, with a +50. The lines of best fit highlight an error in my prediction as I predicted that the greater the amounts of zinc the faster the rate of reaction. Silver is lower in the reactivity series than Zinc and therfore cannot displace the Sulphate from the Zinc.
Fifteen minutes is a good compromise wait time. Apparatus Chemicals Eye protection Bunsen burner Tin lid sitting on a tripod or a strip of ceramic paper Beaker 100 cm 3 Circuit tester battery, bulb and leads Optional Safety screens Optional Test-tubes, 2 Optional — see Procedure g Test-tube rack Access to a balance weighing to the nearest 0. When the element and the compound are mixed, the element replaces the anion or the cation in the compound. Well, the copper started as a cation. By drawing a line of best fit we can interpret the rates of reactions by calculating the gradient. The balanced chemical reaction : Types of reaction : Thermal decomposition reaction : It is defined as the breaking down of a chemical compound due to heating. Fill a 50-mL beaker with distilled water.
Select various metals to test in aqueous M 2 + solutions. Heat should be given off so I can predict that the experiment will be exothermic. Well 6 has the largest amount of precipitate, and there is a stair-step on either side of that well. The zinc corrodes preferentially forming a protective oxide layer. Perform this reaction under a hood or with ventilation such that none of the gas at all is inhaled. So zinc sulfate is a clearish liquid. The reaction of copper sulfate and zinc can be saved and reused as a prop for intro to thermodynamics per Prof.
In a competition between Cu 2+ and Zn 2+ ions for electrons, copper ions will win. The experiment illustrates the difference in reactivity between zinc and copper and hence the idea of competition reactions. The observations of the reactivity series of metals reacting with water, metals reacting with hydrochloric acid and metal displacement reactions are described and tabulated below. Sorry, your browser does not support mp4 format video. Evaluation In general my experiment has been a success as it has produced fairly accurate results. Metal Reactivity Series How to set up reactivity series experiments - observations and deducing the reactivity order What do you see? So that's solid zinc right over there.
And the zinc loses those electrons to the copper. Reactivity series metals : Potassium Sodium … Lithium Calcium Magnesium Aluminium Zinc Iron Tin Lead Copper Silver Gold Platinum Adding zinc to copper sulfate will result in a displacement reaction that will create copper metal to precipitate as a solid. I also predicted that the mass of zinc would rise in direct proportion to the temperature. The reactivity series is as follows: Element Symbol Group Number Potassium K 1 Sodium Na 1 Lithium Li 1 Calcium Ca 2 Magnesium Mg 2 Aluminium Al 3 Carbon C 4 Non-Metal Zinc Zn Transition Metal Iron Fe Transition Metal Tin Sn 4 Lead Pb 4 Hydrogen H Non-Metal Copper Cu Transition Metal Silver Ag Transition Metal Gold Au Transition Metal Platinum Pt Transition Metal Most Reactive Least Reactive As I am varying the amounts of zinc, I can predict that the greater the amounts of zinc the faster the rate of reaction. Have strips emptied in the disposal jar. A temperature measurement with a thermometer can be used to confirm that the temperature of the solution is significantly higher after mixing than before.
This is why the magnesium metal will start to disappear and the atoms making up the metal will become Mg2+ ions and go into the solution. Also, if we take the the test tube near a litmus paper, the color remains same. So let me write that down. These reagents are dangerous and must be handled properly. This would be done to see how the use of different reactions change the temperature and energy changes and if the theory still works with different metals. Using more accurate and sensitive scales. So the copper metal is able to lose two electrons and displaces the less reactive silver out of the solution.
Also using plastic lids to stop any unwanted substances from interfering with the experiment and to stop heat from being easily lost. The equation is shown below important aspect of these experiments is that they are exothermic. Be sure to compare the properties of the metallic copper used at the outset with the copper metal produced in the last step. If the unknown strip of silver-grey metal is added to the copper sulfate solution and no reaction occurs then the metal is silver, as copper metal is more reactive than silver metal as it higher in the activity series so copper ions are unable to be displaced from the solution. The gas produced when copper reacts with nitric acid is toxic.