floating around in the solution. After being heated for a time the aqueous solution turned gray and a black precipitate was formed. Part IV: Formation of copper (II) sulfate Observations of copper (II) oxide when reacted with 6mL of 3 Moles of Sulfuric acid: the black precipitate disappeared. The resulting solution turned blue Part V: Formation of copper metal Weight of Zn added: 1.107g *The professor also added some mossy Zinc. Weight unknown. Observations of copper (II) sulfate when 1.107g
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Standardization of NaOH and Determination of Unknown Acid KEYWORDS: quantitative analysis‚ titration‚ buret‚ endpoint‚ standardization‚ half-equivalence point‚ calorimetric titration‚ potentiometric titration ABSTRACT: The concentration of sodium hydroxide was determined by colorimetric titration‚ and the identity of an unknown acid was determined by potentiometric titration. In the first titration‚ a strong acid standard‚ potassium hydrogen phthalate (KHP)‚ was used‚ to determine the concentration
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37-104-105-2-methyl-2-propanolC4H10O74.12-25.482.4Hazard Concentrated sulfuric acid and nitric acid are highly corrosive. ObservationPart II Friedel-Crafts AlkylationThe concentrated sulfuric acid used was yellow. 1‚4-Dimethoxybenzene was in white crystal form. The t-butyl alcohol solidified in room temperature‚ so it took a while to heat it up and return to liquid form. After concentrated sulfuric acid was added to the t-butyl alcohol‚ acetic acid and 1‚4-Dimethoxybenzene mixture‚ the solution became light
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The Earth’s atmosphere has changed over billions of years‚ but for the past 200 million years it has been much as it is today. We are‚ however‚ causing our atmosphere to change by human activity. Burning fossil fuels and deforestation are two examples of human effect on the environment. Composition of the Earth’s atmosphere The composition of air You need to know the proportions of the main gases in the atmosphere. The Earth’s atmosphere has remained much the same for the past 200 million years
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were the following: * Methyl red * 0.1M Nitric Acid * 0.5M Copper sulfate – sulfuric acid mixture * 0.1M Sodium hydroxide * Acetone * Distilled water The apparatus used were the following: * Phywe Transference Number Apparatus * Analytical Balance * Buret * Beaker * pipet The experiment starts off with the preparation of the set-up for the transference vessel. Fill the double U-tube with 0.1M Nitric acid. The double U-tube should be filled to the same level
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Conductimetric Titration and Gravimetric Determination of a Precipitate Objective: * Measure the conductivity of the reaction between sulfuric acid and barium hydroxide * use conductivity values to determine equivalence point * measure mass of a product to determine equivalence point gravimetrically * calculate molar concentration of barium hydroxide solution Procedure: * First‚ combine 10.0 mL of the Ba(OH)2 solution with 50 mL of distilled water. Then‚ measure out 60 mL
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Weight Melting Point Boiling Point Acetic Acid C2H4O2 60.05 g/mol 16-17°C 118-119°C T-Butanol C4H10O 74.12 g/mol 25-26°C 82-83°C 1‚4-dimethoxybenzene C8H10O2 138.16 g/mol 54-56°C 212.6°C Nitric Acid HNO3 63.01 g/mol -42°C 83°C Major Chemical Reactions: Procedure: 1. Measure 120 mg of 1‚4-dimethoxybenzene‚ 0.4 mL acetic acid‚ and 0.2 mL t-butyl alcohol 2. In a 10X100 mm
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The Elizabethan Era Medicine and Alchemy The medicinal practices and problems of the Elizabethan Era were very important to the people‚ although they are very different from those of today. There were many different beliefs and diseases‚ like the Plague. Medicine was not an exact science and was related to Alchemy (Chemistry). Here‚ some of the many practices and beliefs of the Elizabethan Era will be discussed. One of the most widely known and important of the beliefs was the humours. It
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Filter funnel (Note 1) Filter paper (Note 2) Bunsen burner‚ tripod and gauze Heat resistant mat PROCEDURE Stage 1 a Add 20 cm3 of the 0.5 M sulfuric acid to the 100 cm3 beaker. Heat carefully on the tripod with a gentle blue flame until nearly boiling. SAFETY: Be very careful not to knock the tripod while the beaker is on it. b When the acid is hot enough (just before it starts to boil)‚ use a spatula to add small portions of copper(II) oxide to the beaker. Stir the mixture gently for up
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distinguished by observing the color changes or solubility while reacting salt x with H2SO4 or a mixture of copper turnings and concentrated sulphuric acid the anion of the salt could be found. AIM: To determine the constituents of salt x. APPARATUS/MATERIALL: * Salt x * Concentrated hydrochloric acid * Concentrated sulphuric acid * Platinum wire * Bunsen burner * 2 test tubes * Universal pH paper * Water * 4 Droppers * Dilute sodium hydroxide * Ammonium
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