CHEMICAL REACTION (SYNTHESIS REACTION‚ DECOMPOSITION AND SINGLE REAPLACEMENT REACTION) Purpose : 1. To identify the chemical changes 2. To observe the effect of temperature of a chemical reaction. Theoritical basic : A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically‚ chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds between
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ReportTitle: Observations of Chemical ChangesDate: 9/9/13Name: Purpose: The purpose of this experiment is for the student to gain knowledge and experience regarding how avariety of chemicals react to one another. In addition‚ the student should also gain a betterunderstanding of the household chemicals that they use in their day to day lives.Procedure:Observe the chemical changes that occur by mixing a list of chemicals (provided in the lab manual).Add 2 drops of the first chemical into a well
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Data Tables: Part 1: Chemicals Well No. Observations of the Reaction A. NaHCO3 + HCl 1A Bubbles appeared for 5 seconds. Now clear in color‚ no bubbles B. HCl + BTB 2A Turned from clear to yellow C. NH3 + BTB 3A Turned from clear to dark blue D. HCl + blue dye 4A Turned from clear to green E. Blue dye + NaOCl 5A Turned from blue to light blue with the 1 drop of HCl 6A Turned from blue->light blue->yellow->light yellow->clear‚ transparent F. NaOCl + KI 7A Turned from clear to Light yellow
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Observations of Chemical Changes Observations from Procedures Well#/ Question Chemicals Reaction A NaHCO3 and HCl-CO2 Bubbles B HCl and BTB Turns Orange C NH3 and BTB Still blue- no change D HCl and blue dye Turns green E Blue dye and NaOCl Stays blue – no change F NaOCl and KI Turns pale orange/yellow G KI and Pb(NO3)2 Milky yellow solid H NaOH and phenolphthalein Turns bright pink I HCl and phenolphthalein Bubbles- cloudy J NaOH and AgNO3 Solid formed/ turned brown K AgNO3 and NH3 No change
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Observations of Chemical Changes Lab Report Expectations: Data Table 1: What you Expected to happen Well #/ Question Chemicals Reaction A NaHCO3 and HCI - C02 A bubble occurrence B HCI and BTB A deep yellow C NH3 and BTB A purple color D HCI and blue dye A deep blue E Blue dye and NaOCI A greenish color F NaOCI and KI A bright red G KI and Pb(NO3)2
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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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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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Analysis of a Chemical Reaction Purpose: To observe a chemical reaction and to use qualitative and quantitative evidence to identify this reaction from among four possibilities. Hypothesis: I think the result is going to produce water. I think this is going to happen because there is hydrogen and oxygen inNaHCO3. Materials: -Test tube clamp - 150 mm test tubes (2) - burner - retort stand - clay triangle - iron ring - crucible Procedure: Part A: 1. Add 0.5 g of NaHCO3
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Two-way reactions continue until equalibrium (the state at which there is balance between reactants and products) is reached. Discovering the equilibrium constant for a reaction is very helpful for understanding that reaction. Knowing the equilibrium constant of a reaction is important because it allows you to calculate how much product will ultimately be formed during a reaction. Moreover‚ it also tells you how a particular mixture of chemicals will react. This is because chemical reactions always
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07.04 Equilibrium: Lab Report Equilibrium Lab Report Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Data and Observations: Insert data tables for each part of the lab (Part I‚ Part II‚ and Part III). Part I Round Reactants Products 1 25 15 2 19 21 3 17 23 4 16 24 5 16 24 6 16 24 7 16 24 8 16 24 9 16 24 10 16 24 25+19+17+16(7)=173 15+21+23+24(7)=227 Product/Reactants==227/213=1
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