3. We've received widespread press coverage since 2003, Your UKEssays purchase is secure and we're rated 4.4/5 on reviews.co.uk. Also when the experiment is set in the ice bath, the reaction time will be much slower than the other temperature sets. “h Pour 10 cm 3 into each test tube and put each of your different lengths of magnesium into each test tube. Graph 1: Rate-reaction trends of magnesium metal ribbon and powder with increasing concentration of HCl, Calculations Add 5 drops of potassium iodide solution. This will reduce reaction errors related to impurities. This substance is produced in the stomach of the human it has the job to break down proteins. I was wondering if you could give me some background information on what goes on in … 6 CE 21 62521 3 The rate of reaction between magnesium and dilute hydrochloric acid can be followed by measuring the volume of hydrogen produced. Observations: Reactants: Products: Chemical Equation: 9. These include the presence or absence of catalyst, temperature, concentration, and surface area of reactants. No plagiarism, guaranteed! VAT Registration No: 842417633. Will it be a slower reaction with the ice bath? Do you have a 2:1 degree or higher? New York: Oxford University Press. Barrans, R. E. (2012, March). Retrieved March 8, 2012, from newton.dep.anl.gov: http://www.newton.dep.anl.gov/askasci/chem00/, Clark, J. Add a 2–3 cm depth of dilute hydrochloric acid to the first three tubes, and a 2–3 cm depth of dilute sulfuric acid to the remaining three tubes. Any scientific information contained within this essay should not be treated as fact, this content is to be used for educational purposes only and may contain factual inaccuracies or be out of date. p137. Caution: hydrochloric acid is corrosive and sodium hydroxide is caustic. Retrieved March 8, 2012, from chemguide.co.uk: http://www.chemguide.co.uk/physical/basicrates/surfacearea.html, Gallagher, R., & Ingram, P. (2001). Caution: Hydrochloric acid is corrosive. Even after disappearance of magnesium ribbon, gas bubbles were evident, implying the reaction was incomplete. The following chemicals and reagents were required in the experimentation: Apparatus and personal protection equipment. Importantly, suitable acid-base indicators can be used to detect the end of the reaction accurately. This brought a slight confusion in stopwatch reading. Secondly, for safety precaution, magnesium ribbon is a flammable solid. Reference this, Kiara Anderson, Laura Knott, Jackson Baker. It is located and used in many ways for example it is contain in toilet cleaners and used for clean the toilet. Magnesium reacts with hydrochloric acid according to the equation: Mg (s) + 2 HCl (aq) --> MgCl2(aq) + H2(g) This demonstration can be used to illustrate the characteristic reaction of metals with acid, a single replacement reaction, or to demonstrate the generation of hydrogen gas. Electrolysis of water Use a U-tube with electrodes at each … While not exactly correct to do so, I'll write "heat" as a product of the reaction to read: Mg + 2HCl => MgCl2 + … [2] (b) Give one observation expected during this reaction. Magnesium metal and hydrochloric acid. Determination of end of reaction was sometimes uncertain. First, repair your working bench by simply removing unnecessary materials. Copyright © 2003 - 2021 - UKEssays is a trading name of All Answers Ltd, a company registered in England and Wales. These include the presence or absence of catalyst, temperature, concentration, and surface area of reactants. 3. 4. Temperature can have many chemical reactions on experiments or natural substances. Add hydrochloric acid slowly and observe the reaction. This is as shown in the equation below: 2HCl (aq) + Mg (s) => MgCl2 (aq) + H2 (g). Next, place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. The experiment was very successful besides at one point in the experiment were the hydrochloric acid strengths were mixed up instead of using 1 molecules we use 0.1 molecule for at least 2 tests. Acids will react with reactive metals, such as magnesium and zinc, to make a salt and hydrogen. Standardized hydrochloric acid concentrations (3.0 M, 2.0 M, 1.5M, 1.0 M and 0.5M ). 2.9K views View 3 Upvoters The main substances that were used in the experiment were hydrochloric acid (HCL) and magnesium ribbon(Mg) when these materials combined there was a chemical reaction, the reaction was that there was bubbling and fizzing when the magnesium dissolved, there was a pattern when the temperatures changed, the molecules in the acid would change speed cause the reaction to be either fast or slow, when the acid was at a high temperature for example 80 C the molecules in the acid were packed together but free to move but they were moving at a high speed but not as fast as gas molecules, this was causing the acid to bubble like boiling water, as the temperature was high this made the magnesium ribbon to dissolve faster. The balanced chemical equation for this reaction is Mg (s) + 2 HCl (aq) produces MgCl 2 (aq) + H 2 (g), where the letter "s" stands for solid, "g" is gas and "aq" represents an aqueous solution. Magnesium ribbon = 37+51+77+158+201/S = 104.8 sec 17th Aug 2017 To measure, the effect of each of above factors, one has to hold some factors constant during rate reaction experimentation. Dictionary.com, n.d. This is an exothermic reaction, meaning that the forming of the bonds MgCl2 and H2 gives off heat. The experiment was started by first unpacking the equipment and tprepare the hydrochloric acid by putting 25 ml in each beaker, then setting up the heat plate to the right setting to heat the hydrochloric acid to 80 C. once the heat plate hit its aiming temperature the beaker was placed on it till it hit the temperature of 80 C when it hit 80 C exactly, a piece of magnesium was placed in the beaker with the chemical reaction being recorded by both a timer and writing down what happened. Repeat step 5 and 6 for 2M, 1.5M, 1M, and 0.5M HCL and keep all the acids ready on the working bench. acquire an understanding … Different temperatures can either increase or decrease the speed of the particles in liquids or gases, causing particles to collect more energy, and to collide and creating chemical reactions when temperature is increased. Hess’s Law states that the enthalpy of a reaction is the same, despite the order the steps of the reaction occurred. Similarly, Gallagher & Ingram (2001) say that the depletion of H+ during the reaction of magnesium and HCl is factor that slows down the reaction as time goes on. Record your observations. Place the test tube in a test-tube rack and add several magnesium turnings. Today magnesium has many uses for example photography, fireworks, bombs and flares. Chemical Reaction Observations Reaction Type Iron and copper (II) sulfate solution The iron turned a brownish red color Single displacement Lead (II) nitrate and potassium iodide solutions It went toward the bottom of the test tube, and the solution appeared as a thick opaque yellow Double displacement Magnesium metal and hydrochloric acid … It is single replacement because the element magnesium is "replacing" the hydrogen in hydrochloric acid. Bubbles of hydrogen are formed, together with colourless solutions of beryllium or magnesium sulphate. Immediately cork the flask to the prepared gas delivery system. Magnesium oxide reacts exothermically with hydrochloric acid and produces magnesium chloride, liquid water, and heat. It can also be described as an oxidation-reduction reaction. All work is written to order. Add the magnesium strip to each boiling tube – ensuring that the Mg is fully immersed in the acid, allow the reaction to proceed for 10 seconds and record your observations. For a laboratory investigation, a student is instructed to place a 2.4 g sample of magnesium ribbon into 500 mL of a 2.0 M solution of hydrochloric acid. Make sure you put on your personal protective clothing and safety goggles. How quickly will the magnesium ribbon react to the hydrochloric acid at different temperatures? Preliminary Investigation: Diagram: Method: “h Set out the equipment as shown above. Therefore, considering concentration factor and surface are factor of reactants it is evident that the rate reaction curve trends would not be linear as expected, but rather exponential. Therefore, we sought to test the duration of reaction of equal lengths Magnesium ribbons with reducing concentrations of hydrochloric acid. Powdered solids produces rapid reactions than the same solids in single lumps. Given that, the experiment was carried out under the same conditions, the data obtained are reliable and generalizable. “h Cut magnesium into 3 pieces of 2, 3 and 4 cm “h Pour 30 cm 3 of 2 molar hydrochloric acid into a beaker. Web. The magnesium is attacked by the hydrochloric acid resulting in the magnesium dissolving into the solution resulting in a solution of magnesium chloride in hydrochloric acid and the production of hydrogen gas. The magnesium ribbon is a bright, shiny, silvery metal. Record your observations. The higher the concentration of the acid the slower the reaction did not take place. Before anything was started, the whole method was reread and memorised so there was an understanding of the experiment. Pick one piece of Magnesium ribbon drop in the first prepared acid in the conical flask and immediately start your stopwatch. The same steps happened with the other temperatures, which were 60 C, 40 C, the room temperature (22 C) and the ice bath (6 C). The student’s observations are recorded in the table. The duration of reactions were recorded as shown in tables 2 and 3 below. Surface Area and Rate of Reaction. THE EFFECT OF SURFACE AREA ON REACTION RATES. During the reaction, the water bath in the gas delivery system showed gas bubbles ascending to the gas cylinder. Record which metal you add to each tube. Metal: Observation… Clark (2002) explains that, finely divided chemical solids have greater surface area than chemical solids in lumps. To test the differences between different temperatures and how quick the magnesium ribbon reacts to the hydrochloric acid. One strip of magnesium is placed in a test tube containing 5 mL of water, and the other strip is placed in a test tube containing 5 mL of hydrochloric acid, HCl. The reaction of magnesium metal with concentrated hydrochloric acid produces hydrogen gas, in a “single-displacement” reaction, due to the fact that magnesium is more chemically active than hydrogen. The increasing of concentration of HCL to react with the magnesium ribbon, consequently speeding up the rate of the reaction. To export a reference to this article please select a referencing stye below: If you are the original writer of this essay and no longer wish to have your work published on UKEssays.com then please: Our academic writing and marking services can help you! Next the correct PPE was equipped so if there was an error there was some protection, the equipment that was essential to equip was. Therefore, the errors were unidirectional therefore consistent. The balloon will expand to the same Although we had predicted and hypothesized that the duration of the reaction would be reduced by a half, the data partially supported the hypothesis since the data was 89.1% close to what we predicted. Choose only one indicator that signifies end of reaction. Magnesium metal and hydrochloric acid solution Place one scoop of magnesium turnings into the test tube. Will it have a quicker reaction with a higher temperature. Prediction Magnesium powder = 16+24+48+89+117/S = 58.8 sec Table 2. Disclaimer: This is an example of a student written essay.Click here for sample essays written by our professional writers. 2. Given that, powdered Magnesium metal has a high surface area than equivalent lengths of Magnesium ribbon, we predict that the former will have shorter duration of reaction with hydrochloric acid than the latter. Cm long there are four main variables, which influence the rate of this reaction water... Records the following chemicals and Reagents the following chemicals and Reagents the following as... Imply that more reacting molecules are at high proximity to each of the variables. Such as magnesium and the test tube and put each of your different lengths of magnesium the aims the. Acid ( HCL ) is known as a chemical element with the magnesium ribbon react to the gas.. 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