Ionic reactions lab report
In a precipitation reaction, the product formed is a precipitate. If no product is created and both products are aqueous, the solution has remained a 'soup' of ions where no ions have bonded to form a precipitate. Discussion of Theory. The precipitate is found by using the solubility rules, or rules that tell whether or not a compound is soluble in water. For example, compounds containing sulfate are mostly soluable, and the data from the lab reflects this, but the exception to this rule includes strontium and barium. All of the compound were aqueous, so the compounds were dissolve and split into their ions. The attraction between the water molecule and the ion is greater than the attraction between the two ions, and this causes the ions to dissociate. Starch will be added to the reaction to facilitate the measure of time during the reaction. Remember, a reaction may be indicated by the formation of a precipitate, color change, or the formation of gas. Sources of Error. Water is a polar molecule meaning that one side is slightly negative oxygen and one side is slightly positive hydrogen.
Some compounds containing certain elements or polyatomic ions are always soluable, such as compounds which contain ammonium or nitrate. When an ionic or polar substance is placed in water, the water molecules are attracted to the charges: the oxygen has a slight negative charge and is attracted to the cations, while the hydrogen, with its slight positive charge, is attracted to the anions.
Make up the following standard solutions: Post a comment or leave a trackback. There are also acid-base reactions where a hydroxide and acid react to form water and a salt and oxidation-reduction reactions where one or more electron is transferred.
Data Table. Cations of group one and two have barely any insoluble salts, therefore, they do not form precipitate.
The precipitate is found by using the solubility rules, or rules that tell whether or not a compound is soluble in water.
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