Acid-base titration Aim To study the titration curve of a strong base-strong acid‚ strong base-weak acid and weak acid-strong base titrations Introduction Acid-base titrations are based on the neutralization reaction between the analyte and an acidic or basic titrant. When an acid and a base are present in a stoichiometric amount e.g. 1 mole HCl added to 1 mole NaOH‚ this means that the equivalent point has been reached in an acid-base system. The end point of an acid-base titration can be
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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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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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effects that acid rain has or does not have on seed growth and germination. The observation gathered from this experiment was that regular rain water that has a neutral pH is a better solution for seed growth. The seeds that were watered with the well water prospered more than the ones grown in the lemon juice solution. The results from this experiment were a little confusing‚ because in the first trial the seeds watered with well water germinated more than the seeds watered with the acid rain solution
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To detect an acid‚ the scientists use indicators. Litmus is one indicator. An acid turns blue‚ litmus red. Acids are a group of chemicals with very similar properties. An acid is a sour-tasting substance. Lemons taste sour because they contain citric acid. The sour milk contains lactic acid while the sour taste of vinegar is due to acetic acid. Acetic acid‚ which is an ingredient of vinegar‚ releases only a limited number of ions and is not a strong acid. All these are weak acids. This is the reason
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