Sodium thiosulfate is safe to handle and store‚ but if it is mixed with an acid‚ a reaction happens. When dilute sodium thiosulfate is mixed with an acid‚ solid sulphur is made‚ which makes the solution appear cloudy. The reaction also makes small amounts of toxic sulphur dioxide gas. You will choose one factor and investigate this factor’s effect on the rate of reaction between sodium thiosulfate and dilute hydrochloric acid. A colorimeter is a device used in colorimetry that generally refers to
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+ 2 NH4+ + S2- Ag2S(s) + 2 NH4+ + 2 NO3- AP Chemistry Name _________________________________ Period ___ Date __/__/__ 4 Reactions in Aqueous Solution Acid-Base & Gas Forming Equations Solutions of Strong Acids & Strong Bases 1. Solutions of hydrochloric acid and barium hydroxide are mixed. 2 HCl + Ba(OH)2 BaCl2 + 2 H2O 2 H+ + 2 Cl-
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(culture medium‚ temperature‚ pH‚ etc.)‚ define the bacterium’s generation time. Generation times for bacteria vary from about 12 minutes to 24 hours or more. The generation time for E. coli in the laboratory is 15-20 minutes‚ but in the intestinal tract‚ the coliform’s generation time is estimated to be 12-24 hours. For most known bacteria that can be cultured‚ generation times range from about 15 minutes to 1 hour. Symbionts such as Rhizobium tend to have longer generation times. Many lithotrophs‚
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Global Warming and Acid Rain INTRODUCTION The phrase Global Warming has become familiar to many people as one of the important environmental issues of our day. Many views have been expressed concerning it‚ from the doom-laden to the dismissive. There is little debate that the earth is undoubtedly warming. It has been the subject of intense debate for decades now. Greenhouse gases such as carbon dioxide and industrial gases from fossil fuels play a huge role in why our environment is changing
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with the standard 0.050 M sulphuric acid provided‚ using phenol red indicator until two or three consistent results are obtained. d. Calculate the weight of acetylsalicylic acid in each tablet and compare your results with the manufacturer’s specification. Compare your results with those given in different brands of aspirin. Titration Results Titration trial 1 2 3 Final burette reading (cm3) Initial burette reading (cm3) Volume of acid used (cm3) Average volume
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QUANTITATIVE RESEARCH METHODS WEEK 1 Date: 28 March 2015 Session Time: 14:00 Course Name: Quantitative Research Methods Meeting location: Meeting Room 3 Discussion subject(s): Summary Statistics T-test One-way ANOVA Contents Introduction 3 Introductory information 3 Summary Statistics 3 Basic Definitions 3 T-test 5 Independent samples t test 5 SPSS Steps 5 One-way ANOVA 6 SPSS Steps 6 Introduction This document focuses specifically on Block/Week 1. The following topics will be covered: Introductory
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greatest achievements. It is full of emotional scenes with lots of ups and downs. The movie shows the role a dedicated woman in a great mathematician’s life who is struggling with schizophrenia. Johns Nash‚ the main character in the movie suffers from schizophrenia. He has an imaginary friend‚ Charles‚ who has a beautiful young niece that also talks to John. In his imaginations‚ John‚ also‚ works for government through an agent in order to display Soviet codes. He thinks the psychiatrist who is
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Trisheena Harricharran 4/1/13 Miguel Perez Chem 106 Sec 006 Observations Materials: * Barium Iodide- White and powdery * Zinc Sulfate- White and powdery * Boiling Chips- Tiny‚ grey and rock like Experimental Observations: Barium Iodide used- .63g Zinc Sulfate used- .45g Boling Tube with 2 boiling chips- 41.52g Barium Iodide in solution with 2 mL of deionized water looks cloudy. Zinc Sulfate in solution with 2 mL of deionized water is clear. Barium Iodide
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Acid Rain Lab #1 Chem. 1 20 February 2016 Concordia University Texas Angelina Luna angelinaluna97@yahoo.com Chem 1- Sect C Acid Rain Lab #1 Professor Koeck Abstract In this experiment our main objective was to create three gaseous oxides CO₂‚ SO₂ and NO₂ by using data that was collected using a pH sensor which was connected to a laptop with LoggerPro and Vernier. We created the gases by bubbling each gas into the water to create the three acidic solutions we were looking for. Once that
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Simple Equilibria 1. Identify the acid/base and their conjugate base/acid‚ and which definition you use to determine(Bronsted‚ Arrhenius or Lewis): a. HCO3- + H+ ↔ H2CO3 Base conj acid: Bronsted b. HCO3- ↔ CO32- + H+ Acid conj base : Arrhenius c. CH3NH2 + H2O ↔ CH3NH3+ + OHBase acid conj acid conj base : Lewis d. C6H5OH + H2O ↔ C6H5O- + H3O+ Acid base conj base conj acid : Lewis‚ Arrhenius‚ Bronsted e. H2O + H2O ↔ H3O + + OHAcid base conj acid conj base - 2. Assuming Kw = 1x10-14
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