Subject: Chemistry SL Title: Preparation of a salt (lead iodide) by using precipitation method. Aim: To produce 1.50 g of lead iodide‚ PbI2‚ assuming 100 % conversion‚ using 1.00 g solid potassium iodide‚ KI‚ and 0.1 M lead nitrate‚ Pb(NO3)2 solution of volume 30 cm3 and hence calculate percentage yield. Calculations: 2KI(s) + Pb(NO3)2( aq) —> PbI2 (s) + 2KNO3 (aq) Mass of PbI2 to be produced = 1.5 g Moles of PbI2 = = 0.003 Moles of KI = 0.003*2 = 0.006 Mass of KI = 0.006*166 = 1.00 g
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manual Data: Mass of Na2EDTA∙2H2O‚ g | .9289 | Standardization of EDTA Solution | Trial 1 | Trial 2 | Final buret reading‚ EDTA (mL) | 18.5 | 36.7 | Initial buret reading‚ EDTA(mL) | 0.5 | 18.5 | Determination of % MgO of Unknown Unknown Number | 4J | | Sample 1 | Sample 2 | Sample 3 | Mass of sample (g) | 0.2135 | 0.2132 | 0.2139 | Final buret reading‚ EDTA (mL) | 73.5 | 74.2 | 74.2 | Initial buret reading‚ EDTA(mL) | 0.5 | 0 | 0 | Measurement of water blank Final buret reading
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Lab Questions By Zackary Conte and Justin Dvorsak The first experiment with 1 M sucrose in the bag and distilled water in the beaker had almost exactly the same results. The masses were relatively the same the difference have could been from the amount of liquid that was placed inside of each of the bags. The second experiment with 5% Ovalbumin in the bag and 1 M sucrose in the beaker had almost exactly the same results. The masses were relatively the same the difference could have been from the
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Aggressive Driving – anxiety and frustration are usually at the root of aggressive or careless driving. Occasionally‚ drivers find themselves in unpleasant situations involving abusive gestures or language from other drivers who take issue with how you are driving. Some tailgate‚ others speed through intersections or fail to yield the right of way. Aggressive driving may lead to “road rage”. If people drive responsibly they will reduce the risks of conflict on the road and help make our roads safer
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About ISO International Organization for Standardization is the largest developer and publisher of International standards. It consist of 162 countries and is a network of national standards of these. It is a non-governmental organization which fill the gap between the sectors i.e.public and private. On one side‚ ISO members are part of the governmental structures of their own country and on other hand‚ some ISO members are having their roots individually in private sector. ISO is derived from
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Product Planning and Standardization Product * Something produced through labor‚ thought and growth. * It is simply a set of tangible physical and chemical attributes assembled in an identifiable form. New Product * It can be a replacement product for some but imitative to the other. Classification of New Product 1. Innovative Product * These product were created upon realization of an unanswered need in the market which has not been fulfilled by any substitutes.
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Discussion and Conclusion: Preparation of 1-Bromobutane The purpose of this experiment was to demonstrate the conversion of a primary alcohol‚ 1-butanol‚ to a primary bromoalkane‚ 1-bromobutane‚ a SN2 reaction. The conversion of 1-butanol to 1-bromobutane relies on sulfuric acid which plays two important roles. First‚ it protonates the alcohol of 1-butanol to form an oxonium ion which is a good leaving group. Secondly‚ it produces the hydrobromic acid‚ the nucleophile‚ which attacks 1-butanol causing the
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To prepare an ester using reflux Hypothesis : The equation was written out for the reaction and pentyl ethanoate was predicted as being the ester that would be formed. Equipment * 10 ml pentanol | * condenser | * 10 ml glacial acetic acid | * Heating Mantel | * 1 ml conc. Sulfuric acid | * Funnel | * 50 ml flask | * 15ml 1molL-1 Na2CO3 | * Boiling chips | * Seperating Funnel | * Retort Stand | * Safety Glasses | Method 1. 10 ml of Pentanol
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For many years‚ efforts to create effective regional transit in Metropolitan Detroit has been interfered by a variety of factors. In my research study I will be researching a program called M-1 Rail Streetcar‚ a public-private partnership is building the region’s first new rail transit‚ a 3.3 mile electric streetcar along Woodward Avenue through downtown and midtown Detroit. Which this service will offer the more fascination‚ dependable transit to residents‚ workers‚ and visitors to the downtown
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NAME……………………………….. TEST-10TH FORM I.Circle the correct answer: 1.I’m too tired to play tennis today‚I……………………..boxes since morning. a)have packed b)am packing c)have been packing 2.She is an excellent journalist.A top newspaper……………………her an important job. a)has offered b)is offering c)offers 3.Jane can’t come.Her car …………………..down. a)has been breaking b)breaks c)has broken 4.If you don’t study‚you……………….pass your exams. a)won’t
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