Hamad IS1‚ B4 Endothermic and exothermic reactions Background information: An endothermic reaction is a product or a substance accompanied by the absorption of heat. An exothermic reaction is a chemical reaction that releases heat. Design: Research question- Which reaction occurs‚ exothermic or endothermic‚ when Epson salt‚ Borax‚ Laundry detergent‚ and baking soda are added‚ separately‚ with water? Hypothesis- If Epson salt is mixed with water then the reaction will be endothermic because salt is used
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II. LEARNING OBJECTIVES - To perform different types of chemical reactions including acid-base‚ precipitation‚ gas forming‚ complex compound forming and oxidation-reduction reactions. - To identify some of the products in these reactions and describe the chemical changes. - To write and balance the chemical equations for the reactions observed. III. EQUIPMENT AND REAGENTS 1. EQUIPMENTThirty test tubes One test tube rack Two test tube holders Two spatulas Three 250 mL beakers One stirring rodOne
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Purpose: The purpose of the ‘Rates of Reactions’ lab is to learn how to plan an investigative lab without outside help and to learn about the ‘Rates of Reactions’. This lab will require students to take responsibility for their own learning and use their prior knowledge to aid in the completion of this lab. In the lab prepared below‚ students will be learning about Rates of Reaction with varying concentrations of Alka-Seltzer with water. Hypothesis: I believe that the more water added to the canister
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Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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complete sentences‚ giving detailed explanations and support for each of your answers. 1. Explain in your own words what it means for a chemical system to be in the state of dynamic equilibrium. After a reaction has occurred for awhile at a given temperature‚ the forward and reverse reaction rate will eventually be equal. Although you may get this confused‚ the concentration may not be equal‚ but the rate will. This occurs in a closed system. In other terms‚ dynamic equilibrium is when no change
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Erin Bolton Chemistry Lab Report April 29‚ 2015 Lab: Reaction Rates Introduction: In this experiment we studied the reaction of potassium persulfate‚ K2S2O8‚ with potassium iodide‚ KI. All chemical reactions have an energy barrier to overcome before the reaction will proceed. We will record data based on the concentration‚ temperature and catalyst for each experiment. Once this has been completed it will be graphed. Procedure: Due to the chemicals being used having hazard gloves are used
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Action – Reaction B: All right‚ I’ll say: how are you all this day of your time‚ as you know time to exist? AUD: Good. Great. Perfect. B: We will begin with questions. Q: I have a question. We have had a physicist in history -- I believe it was Sir Isaac Newton -- he said for each action there is an equal and opposite reaction. Is that true in your culture? B: All right‚ understand‚ first of all‚ there will be many ideas and interpretations along that line‚ as you understand
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The effect of time on enzyme reaction. Abstract: In this lab investigation we will observe how the amount of hydrogen peroxide is affected by catalase over time. The enzyme was added to 10 mL’s of hydrogen peroxide and observed over time to determine the relation between time and enzyme activity. The hypothesis stated that as time increased substrate would decrease. Therefore I predicted that at 60 seconds‚ there would be the least amount of H2O2. The enzyme activity mirrored my predictions
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chemical reaction and relate those reactions to products commonly found in a home environment. Through this experiment someone can macroscopically analyze whether a solution is acidic or base and identify the presence of starches in food. Procedure For each of the combinations of chemicals below put 2 drops of each in their own well in the 96-well plate. Making sure to place only 2 drops of the first chemical then adding only 2 drops of the second chemical the observation of the reaction can be made
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r Lab Report 5 Introduction to the Classes of Chemical Reactions Course: Chem. 1151L‚ Tuesday & Thursday June 23‚ 2011 Mr. Nasir Uddin Pre Lab Questions: 1. CaBr2 (aq) + K3PO4 (aq) → CA(PO4)2(S) + KBr (aq) = Ca3(PO4)2 + 6 KBr Double Replacement 2. Li(s) + O2(g) = Li2O(s) =2 Li2O Decomposition 3. CH4 + O2 = CO2 + H2O = CO2 + 2 H2O Combination 4. AgBr(s) = Ag (s) + Br2(l) = 2 Ag + Br2 Combination 5. Mg(s) + H2SO4 (aq) = MgSO4 + H2
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