Acid Rain Acid rain occurs when Sulphur Dioxide (SO2) is released into the atmosphere by electricity generation‚ motor vehicles‚ factories and by wildfires and volcanoes. Once released‚ the sulphur dioxide reacts with water to produce sulphuric acid. This has a pH of approximately 2-3 pH. This has a dramatic effect on water dwelling wildlife. Most water dwelling creatures can’t withstand water more acidic than pH 5. This causes the mass loss of life of animals such as trout‚ perch‚ frogs and mayflies
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Weak Acid Titration Abstract: Our method for determining the unknown weak acid was to determine the equilibrium constant K from the molecular weight of the weak acid from our titration data. In this lab the acid Potassium hydrogen phthalate and two unknown acids were titrated. We determined the molar mass of the Potassium hydrogen phthalate‚ for the unknown acids we calculated the molar mass and the Ka values. We used NaOH as the known base for titrating in all three of the titrations. Our
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Concentration Problem Sets Do the following problems in your lab notebook. Be sure to specify the knowns & unknowns‚ the formulas used‚ show your work with labeled units and round you’re answers to the appropriate significant figures. 15-1 Molarity Problems: (M = moles/ liter ) 1. What is the molar concentration of a 415 ml solution containing 0.745 moles of HCl? (A: 1.80 M HCl) 2. What is the molar concentration of an acetic acid (CH3COOH) solution containing 3.21 moles in 4.50 liters
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Abstract The objective of this experiment was to observe multi-step purification of benzoic acid after performing the extraction from a mixture containing benzoic acid‚ cellulose‚ and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have
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Introduction The parade of corporate accounting scandals of the last decade‚ with lion’s share occurring in 2002‚ has developed deep antipathy and distrust towards corporations and their reporting practices‚ and casted doubts on the opinions of audit firms. As majority of these accounting frauds occurred in the US (See Appendix)‚ there was a widely-held view that rules-based accounting standards have allowed failure of large corporations like Enron and World Com‚ since US GAAP is perceived to
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ICSE Class X Chapter 5 Hydrogen Chloride and Hydrochloric Acid Hydrogen chloride (HCl) : Formula : HCl Nature : Covalent. Molecular Mass : 36·5u [i.e. HCl = 1 + 35·5 = 36·5] Occurrence : (i) Present in gastric juices. (ii) Present in volcanic gases. Laboratory preparation of HCl gas : Hydrogen chloride gas is prepared in laboratory by heating conc. H2SO4 with NaCl. NaCl + H2SO4 Heat → NaCl + NaHSO4 Heat → NaHSO4 + HCl Sodium hydrogen sulphate Na2SO4 + HCl
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The CRAAP Test Worksheet Name: use the following list to help you evaluate. Answer the questions as appropriate‚ and then rank each of the 5 parts from 1 to 10 (1= unreliable‚ 10=excellent). Add up the scores to give you an idea of whether you should use the resource (and weather your teacher would want you to!). Currency: the timeliness of the information …………………………………. ____ When was the information published or posted? ________________________ Has the information
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Debit • Credit • BOP must be in equilibrium • Balance of payments in Pakistan • Causes of adverse balance of payments • Measures to correct BOP • Conclusion Introduction: Balance of payments refers to sum of both the balance of visible and invisible items. The balance of Payment is a comprehensive annualrecord of economic relation of a country with the rest of the world during a given period of time. A balance of payments (BOP) sheet is an accounting record of all
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Assignment 2: Answer Sheet (LSM 1401 Semester 2 AY2011/12) Nucleic Acid Virtual Laboratories |Name | | |Matriculation number | | |A. DNA Extraction Virtual Lab [2 marks]
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The Balance of Nature This paper will be about the balance of nature between plants and animals. It will also state how complex their ecosystems are. This paper will be informative in the areas of the balance of nature itself‚ plant and animal interactions‚ and changes in the ecosystem. Living things or organisms provide each other with substances necessary for life‚ and a proper balance between plants and animals is needed to maintain life (1‚ p.246d). AEcology is the study of interrelationships
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