LAB REPORT Introduction: In a chemical change‚ the identities of substances change and new substances form. In an equation the substances on the left are the reactants. The substances on the right are the products. In this experiment the objectives are to observe evidence that a chemical change has taken place. Infer from observations that a new substance has been formed. Identify and record observations that show energy is involved in chemical change observe the color‚ solubility of some substances
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AP Chemistry: Chapter 17 Student Notes Objectives 17.1a: Review Redox Assign Oxidation Numbers to the following: a. HNO3 b. PbSO4 c. (NH4)2Ce(SO4)3 Balance the following in acidic medium Al (s) + MnO4- (aq) Al3+ (aq) + Mn2+ (aq) Balance the following in a basic medium Mg (s) + OCl- (aq) Mg(OH)2 (s) + Cl- (aq) Balance the following Redox Reaction: The big nasty problem K4Fe(CN)6 + KMnO4 + H2SO4 KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 +H2O 17.1: Galvanic Cells
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Background information In the experiment we find the volume of gas produced from a known mass of solid which we are studying in class about Stoichometry and how you solve mass-volume in a equation. Keywords Theoretical volume Experimental volume Stoichiometry Balanced equation Safety tips Make sure goggles are on at all times during the experiment. If you have long hair make sure you have a hair tie because we are using fire. If you accidently spill the chemical on yourself make sure to quickly
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CaCl2·2H2O 1 mol CaC03 To double-check‚ we can calculate CaCO3 theoretical yield by using Na2CO3 0.72 g Na2C03 x 1 mol Na2C03 x 1 mol CaC03 x 100 g CaC03 = 106 g Na2C03 1 mol Na2C03 1 mol CaC03 www.LabPaq.com 56 ©Hands-On Labs‚ Inc. Experiment Stoichiometry of a Precipitation Reaction Questions A. From your balanced equation what is the theoretical yield of your product? B. According to your data table‚ what is the actual yield of the product? C. What is the percent yield? D. A perfect percent
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For my mental toughness assignment‚ I have chosen to improve my test taking anxiety. I have always had an underlying fear of failure‚ so even when I study for a test until I practically know every answer‚ I still fear that I will fail it‚ thus giving me anxiety of test taking. This week I have back to back Algebra 2 and Chemistry tests‚ so this will be the perfect opportunity to use the method I learned from the video shown in class. My goal for each test is to receive at least an A‚ or
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Problem Set Introduction to Stoichiometry Name: ______________________________________________________ Course/Yr/Section: ____________ Date:_____________ Direction: Analyze and solve each problem carefully‚ write the solution on the space provided. Box your final answer/s. (10pts each) Determine the molar mass of the following: a. Al(NO3)3 b. ZnSO4 c. Ba(C2H3O2)2 d. NaHCO3 CH3COOH Calculate the percentage oxygen in the following compounds: a. Na2CO3 b. BaSO4 c. BaO
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AP Chemistry Name _________________________________ Period ___ Date __/__/__ 4 Reactions in Aqueous Solution Precipitate Practice #1 Write balanced molecular and detailed ionic equations. Strike out any spectator ions. 1. Solutions of lead nitrate and potassium chloride are mixed. Pb(NO3)2(aq) + 2 KCl(aq) PbCl2(s) + 2 KNO3(aq) Pb2+ + 2 NO3- + 2 K+ + 2 Cl- PbCl2(s) + 2 K+ + 2 NO3- 2. Solutions of sodium sulfate and calcium bromide are mixed. Na2SO4(aq)
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Objectives Different characteristic cations will form different colors when they are burned or added base. In these two experiments‚ scientist took some sample of barium hydroxide (Ba (OH) 2·H2O)‚ ferric chloride (FeCl3·6H2O)‚ copper chloride (CuCl2· 2H2O)‚ calcium chloride anhydrous (CaCl2)‚ potassium carbonate crystal (K2CO3· 2H2O)‚ strontium chloride hexahydrate (SrCl2· 6H2O)‚ lead nitrate (Pb (NO3) 2)‚ sodium chloride (NaCl) and magnesium chloride hexahydrate (MgCl2· 6H2O). In the first experiment
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The addition of 6.0 M NH3 in the fifth test tube caused the formation of the deep blue [Cu(NH3)4]2+ complex. The new equilibrium was established from the dissociation reaction of Cu(OH)2 and NH3‚ and the formation of complex [Cu(NH3)4]2+. 1.0 M Na3PO4 was added to the sixth test tube‚ and formed a light blue
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ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The main purpose for this experimental lab is to determine the atomic weight of magnesium‚ as well as an underlying purpose in determining the relationship between moles evolved and consumed. This can be demonstrated by measuring the hydrogen gas evolved by performing a chemical experiment when hydrochloric acid reacts with the magnesium. The formulated reaction includes; Mg + 2HCl → H2 + Mg2+(aq) + 2Cl- (aq) The major findings contributing
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