Problem 3PE
Writing Symbols for Atoms
Magnesium has three isotopes with mass numbers 24, 25, and 26. (a) Write the complete chemical symbol (superscript and subscript) for each. (b) How many neutrons are in an atom of each isotope?
Give the complete chemical symbol for the atom that contains 82 protons, 82 electrons, and 126 neutrons.
CHEM 203 – Organic Chemistry I Separation of Organic Compounds by Acid-Base extraction techniques Introduction A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at some stage of product purification. In this experiment you will use extraction techniques to separate a mixture of an organic acid and a neutral compound. Organic acids and bases can be separated from each other and from neutral compounds by extraction using aqueous solutions of different pH values. Most organic carboxylic acids are insoluble or slightly soluble in water, but are highly soluble in dilute aqueous sodium hydroxide because the acid is deprotonated by the base producing the sodium car
