One example of these is the Franklin-Marshall solvent system hypothesis.
One example of these is the Franklin-Marshall solvent system hypothesis. One is named after Gilles Klopman and Ralph Pearson, and rebuts the presumptions of Fajans Rules. One of them is named after Usanovich, and is helpful because it extends beyond co-ordination reactions. The Lux-Flood one depends upon oxides, and the above Pearson one is known as the hard-soft principle. The Bronsted-Lowry one depends on acceptance of protons, the Lewis one on electron pairs, and the Arrhenius one simply on the presence of H+ and OH- ions. FTP, these are all what type of theories, which provide ways to determine if the pH of a compound is above seven or below seven.
One example of these is the Franklin-Marshall solvent system hypothesis.
{acid-base} theories (accept just about anything close mentioning acidity/basicity)