C2H5OH | 16 | Hydrobromic acid formula | HBr | 17 | Hydrosulfuric acid formula | H2SO4 | 18 | Nitrous acid formula | HNO2 | 19 | Potassium phosphate formula | KH2PO4 | 20 | Silver nitrate formula | AgNO3 | 21 | Sodium carbonate formula | Na2CO3 | 22 | Sodium chloride formula | NaCl | 23 | Aaluminum hydroxide formula | Al(OH)3 | 24 | Magnesium hydroxide formula | Mg(OH)3 | 25 | Methane formula | CH4 | 26 | Nitrogen monoxide formula | NO | 27 | Potassium hydroxide formula | KOH
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Using a primary standard to analyze acid and base solutions Acid-base titration Lab 13G Jake Shewchuk Lab 13C Dominique Genereux Purpose 13G: 1. To prepare a standard solution of oxalic acid and use it to standardize an unknown sodium hydroxide solution. Purpose 13C: 1. To titrate a hydrochloric acid solution of “unknown” concentration with standardized 0.5M sodium hydroxide. 2. To titrate a hydrochloric acid solution of “known” concentration
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Chemical Reactions and their Classifications 26 October 2012 Abstract: Ordinary laboratory ware was used to determine how many of what type of chemical reactions occurred. This yielded three decomposition reactions‚ four substitution reactions‚ and three metathesis reactions. Introduction There are many different types of chemical reactions in the study of chemistry; A composition reaction (also known as synthesis) is defined as the reaction that occurs when two single compounds combine in
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SUMMARY OF ORGANIC REACTIONS SECTION 1 - ALIPHATIC Aldehydes and ketones |Type of reaction |Mechanism | |1. oxidation (aldehydes only): aldehyde ( carboxylic acid |n/a | | | | |reagents: potassium
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Nitroprusside Test Test for Amide Pauly’s Test Alpha-naphthol‚ NaOBr‚ NaOH‚ urea(to stabilize color & destroy excess OBr ions) Pb(CH3COO)2 NaOH Na2Fe(CN)3 in dil. NH3 NaOH Diazo rgt. (1% sulfosalicylic acid with 5% NaNO2)‚ 10% Na2CO3 Reaction/Principle Complexation Form. Of coordination complex Cu+2 and 4 N atoms (2 from each 2 polypeptide chain) Phenolic group of Y Old rose/flesh to red ppt. Complexation(mercuration & nitration or nitrosation/complexation
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determine the exact concentration of a monobasic acid‚ HX‚a standard base solution is prepared. Then‚ a certain amount of standard base solution is titrated with the monobasic acid. This is an acid-base titration. The equation for the reaction is Na2CO3(aq) + 2HX(aq) → 2NaX(aq) + H2O(l) + CO2(g) Procedure: 1. Weight accurately about 13.20-13.50g of solid sodium carbonate in a small beaker. Dissolve this in the beaker. Transfer the solution and washing into a 250cm3 standard flask and make
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because the other anions would have created a precipitate in a different color. After centrifuging and separating the sample we added BaCl2 which resulted in another white precipitate. The reaction showed that Na2SO4 must have been present and not Na2CO3 because there was no brown precipitate formed in the previous reaction and Na2SO4 would have been the only anion to create a white precipitate with BaCl2. After adding both reagents it was clear that unknown sample 1 contained NaCl and
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Ba2+ | NaCl | White ppt‚ AgCl(soluble in 12M HCl‚ soluble in sln of good complexing agent‚ 6M NH3) | White ppt‚ PbCl2(soluble in hot water‚ soluble in 12M HCl‚ soluble in sln of xs NaOH) | Soluble – no ppt | Soluble – no ppt | Soluble – no ppt | Na2CO3 | White ppt‚ Ag2CO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | White ppt‚ PbCO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | Blue ppt‚ CuCO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | Green ppt
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Experiment 1: Isolation of Casein from Milk * pH of milk – 6.6 * milk = 87.1% water‚ 4.9 % CHO 3.9 %‚ fats‚ 0.7% minerals Experiment 2: Protein Hydrolysis and Characterization | Reagents | Principle | Test for | Positive Result | Negative Result | Biuret | CuSO4‚ NaOH | Complexation of Cu+2 with amide N atoms | Polypeptide bonds | Violet/purple solution | Blue color solution | Sakaguchi | 10% NaOH‚ 0.02% α-naphtol solution‚ 2% NaOBr | arginine condenses with α-naphtol and NaOH
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want inorganic ions floating around in our final product. After the reaction is complete‚ steam bath is required to separate the two layers of mixture. Lower layer is extracted since it’s aqueous layer filled with H2SO4‚ HNO3 and H2O. Add Et2O‚ aq Na2CO3 and water to multiply the product so that it can be extracted again. Bottom aqueous layer loaded with Na+‚ HCO3-‚ Cl- is extracted using Pasteur pipet. Dry the product with CaSO4 thoroughly. This step is important because if there’s any water residue
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