In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. magnesium (Mg) is known as a chemical element with the atomic number of 12. In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. The aim of this experiment is to verify the effects of surface area of solid reactants and concentration of aqueous reactants on the rates of acid-base chemical reactions. The Reaction of Magnesium with Hydrochloric Acid In this experiment you will determine the volume of the hydrogen gas that is produced when a sample of magnesium reacts with hydrochloric acid. The concentration of HCl acid solution is controlled through serial dilution. Magnesium powder = 16+24+48+89+117/S = 58.8 sec I tried this but the reaction happened very quickly and the results of the volume of hydrogen were very spread out. 36.5 g C. 73.0 g D. 82.6 g Introduction In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. Part I Citric Acid plus Baking Soda 2. This will reduce reaction errors related to impurities. 5 7980 • In two experiments, two equal masses of magnesium ribbon were allowed to react with two 50 cm3portions of dilute hydrochloric acid. Magnesium is a light, shiny grey metallic element; symbol Mg, atomic number 12, found in-group two in the periodic table. Experiment 5 Reaction of Magnesium with Hydrochloric Acid OUTCOMES After completing this experiment, the student should be able to: develop a procedure for generating and measuring a gas in a reaction. Hypothesis: Powdered Magnesium metal will reduce the reaction duration by a half if used in place of equivalent length of magnesium ribbon, when reacted with hydrochloric acid. Table 2. In further investigation to keep this variable controlled would be to have the temperature of the HCl tested with a thermometer before the acid is combined with the magnesium. The magnesium is a solid that reacts with the aqueous hydrochloric acid to form hydrogen gas and aqueous magnesium chloride. Importantly, suitable acid-base indicators can be used to detect the end of the reaction accurately. Website. The balanced formula for this is: Mg (s) + 2HCL (aq) MgCl2 (aq) + H2 (g) Magnesium + hydrochloric acid Magnesium Chloride + Hydrogen I am reacting different masses of Magnesium with hydrochloric acid to find the temperature change. The formula equation for this experiment is: Mg + 2HCl MgCl2 + H2 The word Equation for this experiment is: Magnesium + Hydrochloric acid Magnesium Chloride + Hydrogen (s) (aq) (aq) (g) Magnesium will react with hydrochloric acid, because it is higher in the reactivity series that hydrogen. To determine the hypothesis, you would first find the time of reaction actually effected by the concentration of HCL solution. The balanced formula for this is: Mg(s) + 2HCL(aq) MgCl2(aq) + H2(g) Magnesium + hydrochloric acid Magnesium Chloride + Hydrogen. Pick one piece of Magnesium ribbon drop in the first prepared acid in the conical flask and immediately start your stopwatch. A table of results showing HCl-Magnesium ribbon reaction duration (seconds) in reducing concentration, Table 3. Zinc and iron also react with hydrochloric acid. The products are a salt (in this case a sulfate) and hydrogen. Magnesium reacts with hydrochloric The data you obtain will enable you to answer the question: 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. Hydrochloric acid (HCL) is a strong, colorless mineral acid used with many purposes. The magnesium displaces the hydrogen in the acid, so it forms magnesium chloride and hydrogen gas. Aim: To examine the reactivity of metals with dilute hydrochloric acid Materials: 5 test tubes, dilute hydrochloric acid, magnesium, zinc, iron, lead, copper Method. 3 cm of magnesium ribbon typically has a mass of 0.04 g and yields 40 cm 3 of hydrogen when reacted with excess acid. Factors That Affect Reaction Rates - Chemwiki 2015. At higher acid concentration, the rates of bubble forming were rapid than those in lower acid concentrations were. Put one piece of magnesium into the beaker of hydrochloric acid, and time the reaction. Magnesium will react with hydrochloric acid, because it is higher in the reactivity series than hydrogen. Then ready with the stopwatch we tipped the magnesium in to beaker and put in the cork with the rubber tubing and started the stopwatch. Record the reaction time in a table like Table 1 (below). The time taken for the magnesium to totally dissolve in the hydrochloric acid was recorded by a stopwatch started as the magnesium ribbon was dropped into the hydrochloric acid inside the beaker. The balanced chemical equation is: Mg_((s))+ 2HCl_((aq))rarrMgCl_(2(aq)) + H_(2(g) The reaction between magnesium and hydrochloric acid combine to form a salt of magnesium chloride and release hydrogen gas. Experiment 5 Reaction of Magnesium with Hydrochloric Acid OUTCOMES After completing this experiment, the student should be able to: develop a procedure for generating and measuring a gas in a reaction. A constant amount of excess HCl is reacted with varying amounts of magnesium solid. In this experiment the reaction between hydrochloric acid solution and magnesium ribbon is used to investigate the effect of reactant concentration on the rate of reaction. The data you obtain will enable you to answer the question: ��G�N��-�x�GO.��֍[2?�Z�Z�Z�%��H�����hَ�]m�z�X�)L�����ɉ��VV��Z�/��*�@�;1!] Through this experiment, we have tested the process in which the time of reaction can be acquired through the undertaking of a chemical reaction, in this case, one between hydrochloric acid and magnesium. A table of results showing HCl-Magnesium powder reaction duration (seconds) in reducing concentration, Graph Reset your stopwatch timer and prepare a gas delivery system including water bath as shown figure one below. The experiment will be carried at a room temperature 25 0C. Place about 5cm depth of the acid in each of the five test tubes; Place a small piece of each of the three metals above. 1. The Reaction of Magnesium with Hydrochloric Acid KEY In this experiment you will determine the volume of the hydrogen gas that is produced when a sample of magnesium reacts with hydrochloric acid. Clark (2002) explains that, finely divided chemical solids have greater surface area than chemical solids in lumps. Place a Styrofoam cup into a 250 mL beaker as shown in Figure 1. Empty the beaker and rinse it out. When magnesium and hydrochloric acid react together, they produce hydrogen right? 2. High concentrations imply that more reacting molecules are at high proximity to each other therefore intermolecular collisions are frequent therefore forming products frequently. 3 0 obj Magnesium will react with hydrochloric acid, because it is higher in the reactivity series than hydrogen. 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, … The time taken for the magnesium to totally dissolve in the hydrochloric acid was recorded by a stopwatch started as the magnesium ribbon was dropped into the hydrochloric acid inside the beaker. Then measured the temperature after experiment. Add up the weights of the five 10 cm-long magnesium ribbons and obtain the average weight in grams. Use the average weight as obtained in 15 above and weigh of an equivalent weight of Magnesium powder (for this case 0.102 grams) and pour into the first conical flask containing the 3 M HCl acid, start your stopwatch, and immediately cork the flask to the gas delivery system. The experiment will be carried at a room temperature 25 0C. Factors That Affect Reaction Rates - Chemwiki 2015. Prediction These are the sources and citations used to research Magnesium and Hydrochloric Acid Experiment. Measure 40 ml of 3M HCl using a clean dry measuring cylinder and pour into a clean 100 ml conical flask. I was suggested to use 20cm3 of hydrochloric acid and 5cm of cleaned magnesium ribbon, and take the volume of hydrogen in the syringe every 10 seconds for the preliminary experiment to. Magnesium ribbon = 37+51+77+158+201/S = 104.8 sec New York: Oxford University Press. This experiment will specifically investigate the effect of concentration change of the reactants upon the rate of reaction, using hydrochloric acid and magnesium strip. We also predict that reaction of powdered Magnesium metal with highest concentration of hydrochloric acid will take the shortest duration of reaction. Factors that influence rates of reactions include change in concentration, temperature, surface area, or the addition of a catalyst. 2 0 obj the heated hydrochloric acid. Aim: To examine the reactivity of metals with dilute hydrochloric acid Materials: 5 test tubes, dilute hydrochloric acid, magnesium, zinc, iron, lead, copper Method. 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. Introduction In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. The experimentation procedures followed were standard for all the two sets of experiments conducted, including data collection mode. A constant amount of excess HCl is reacted with varying amounts of magnesium solid. In this experiment you will determine the volume of the hydrogen gas which is produced when a sample of magnesium reacts with hydrochloric acid. The hydrochloric acid appeared to be clear liquid and looked very similar to rubbing alcohol. Similarly, the duration of reaction will be determined using equivalent weights of powdered Magnesium metal. 50 cm 3 of 1M hydrochloric acid is a six-fold excess of acid. Stop the watch when all the magnesium disappears. Concentration of acid (M) Reaction time (s) time 1 (s–1) 2.0 1.6 1.2 0.8 0.4 3. This brought a slight confusion in stopwatch reading. Magnesium will react with hydrochloric acid, because it is higher in the reactivity series than hydrogen. In further investigation to keep this variable controlled would be to have the temperature of the HCl tested with a thermometer before the acid is combined with the magnesium. Chosen experiment: The task is to alter and record the different temperatures when magnesium ribbon is places hydrochloric acid… Chemicals and Reagents The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph This is intended as a class practical. • The gas produced was collected in a gas syringe (as shown opposite) so that its volume could be measured. Obtain and wear goggles. Temperature influences the rates of reaction through kinetic energy, such that high temperatures increase the kinetic energy of reacting molecules therefore causing frequent collisions, which form products faster. Retrieved March 8, 2012, from chemguide.co.uk: http://www.chemguide.co.uk/physical/basicrates/surfacearea.html, Gallagher, R., & Ingram, P. (2001). Why does the amount of hydrogen produced per second decrease with time?? In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. The balanced formula for this is: Mg(s) + 2HCL(aq) MgCl2(aq) + H2(g) Magnesium + hydrochloric acid Magnesium Chloride + Hydrogen. The chemical reaction between hydrochloric acid and magnesium produces magnesium chloride and hydrogen gas. Determination of end of reaction was sometimes uncertain. endobj This experiment determines the stoichiometry of a reaction of magnesium and HCl by measuring the pressure of the hydrogen gas produced using a PASCO Absolute Pressure Sensor and a PASCO Science Workshop 500 computer interface. Clean the Magnesium ribbon using a sand paper to remove oxides coating its surface. <> For the 10 cm magnesium metal used, there was slight variation in weight. Expt Sulphuric 3 3 should add measured amount of magnesium … �j��?�����2��>2r���I��M��Q�l�����q)T��84�%�W{��i|���A�K� 4`���e�]D�@b�@���J4(�,�԰ k�(K��x�銁�Qth�%����ѽ67�m�VdrD�����վ�����PU�`�\p��+���"�ת-�ب����zf���.����i���v��:������4�ȣ� �픢6k`֑�P�c� �u����Z��v��;E�cE;��X�H���. Materials: Mg ribbon 3 Petri dishes 1.0 M HCl 1.0 M boric acid 1.0 M acetic acid Procedure: 1. Concentration of acid (M) Reaction time (s) time 1 (s–1) 2.0 1.6 1.2 0.8 0.4 3. This bibliography was generated on Cite This For Me on Thursday, March 26, 2015. Research Question: If magnesium ribbon is replaced with an equivalent weight of powered magnesium, does the rate of reaction between magnesium and hydrochloric acid double? During the reaction, the water bath in the gas delivery system showed gas bubbles ascending to the gas cylinder. For instance hydrogen bubbles block magnesium surface or blow the magnesium to the surface of the acid solution therefore, slowing down the reaction. 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