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Chemistry

Diels-Alder reaction

Subject - Organic ChemistryThe Diels-Alder reaction combines a 1,3-diene with an alkene (dienophile) to form a cyclohexene derivative. Alkenes react particularly easily - as & 34; good dienophiles & 34; so to speak - with electron-withdrawing substituents such as maleic anhydride. Instead of the alkenes, it is also possible to use alkynes or compounds with heteroelement multiple bonds such as e.g.
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Chemistry

Introduction to wave optics

Did you complete the learning unit Introduction to Wave Optics and are you looking for further material? Then we recommend the following learning units: Double slit experiments 60 min. Physics Optics Wave optics This learning unit is about getting to know interference as an important characteristic of light waves.
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Chemistry

Impact-resistant polystyrene

Do you have problems understanding the learning unit impact-resistant polystyrene? Then you may be missing the following basics: Polystyrene30 min.ChemistryTechnical chemistryProduction technologyThe module gives an insight into the discovery and use of polystyrene. Technical production processes for polystyrene (PS) are presented.
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Chemistry

ABC transport systems

Function of the ABC-ATPasesABC-ATPases are one of the largest and most highly conserved families of molecules; their representatives are found in abundance in all organisms. Their name comes from the ATP-binding cassette (ABC), an ATP binding and hydrolysis site that is essential for the function of these molecules.
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Chemistry

Acids and bases

Example 2 First, the change in the pH value of an acetic acid / acetate buffer with 1 molL-1 HAc and Ac− with the addition of 0.1 molL-1 HCl0.1 molL-1 NaOH is to be calculated. The pH of the buffer before the addition is 4.75 because HAc = A− .pH = pKa + lg (A- HA) The added hydrochloric acid converts the equivalent amount of acetate into acetic acid: pH = 4.75 + lg (Ac - - HCl HAc + HCl) pH = 4.75 + lg (1−0.11 + 0.1) pH = 4.66 ⇒ ΔpH = −0.09 The added sodium hydroxide forms the equivalent amount of acetate from acetic acid.
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Chemistry

Exercise 2

Exercise Fig. 1 Which isomer is shown here in the Fischer projection? Please make a selection.Please make a selection.correctfincalpartially correctThis is the correct answerResetEvaluateShow the solution
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