Which of the following statements is not true regarding acids?

-Arrhenius acid is any substance that increases the concentration of hydronium ions.
-Brønsted-Lowry acid is any substance that donates a hydrogen ion.
-Lewis acid is a substance that donates a lone-pair of electrons.
-The pH is less than 7.0.

Question

Which of the following statements is not true regarding acids? 
 	
-Arrhenius acid is any substance that increases the concentration of hydronium ions.
-Brønsted-Lowry acid is any substance that donates a hydrogen ion.
-Lewis acid is a substance that donates a lone-pair of electrons.
-The pH is less than 7.0.

anonymous · Answer

Statement one is true. Statement two is true. Statement three is false. A Lewis acid is an electron acceptor. By doing so, it can decrease the number of OH- in solution or become H3O. Statement four is true. You can read more about the Lewis definition of acids and bases at this link: http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch11/lewis.php