Bolivarian Republic of Venezuela Ministry of Popular Power for University Education Polytechnic University Institute Santiago MariĂąo Merida - estate Merida
ACID-BASE REACTIONS AND PRECIPITATION REACTIONS
Ariana Hernandez 26052759 Chemical engineering
Acids: • They taste sour. • They are corrosive to the skin. • Some vegetable dyes are reddened. • Dissolve substances • Attack metals by releasing H2. They lose their properties by reacting with bases.
Bases: • It has a bitter taste. • Soft to the touch but corrosive with the skin. • Colors blue to certain vegetable colors. • Precipitate substances dissolved by acids.
BRÖNSTED-LOWRY. • HCl (g) + H2O (l) H3O+(ac) + Cl– (ac) • NH3 (g) + H2O (l) NH4+ + OH– ARRHENIUS. AH (en disolución acuosa) A– + H+ LEWIS • HCl (g) + H2O (l) H3O+(ac) + Cl– (ac) • NH3 (g) + H2O (l) Á NH4+(ac) + OH–(ac)
By the addition of reagents, the soluble contaminants are transformed into insoluble forms or of a lower solubility. The elimination of the solution will be all the more complete (quantitative) the more insoluble the compound formed.