The notion that acid salts exist only for diprotic and polyprotic acids is found in many high school and university textbooks, although the "only" condition is not always stated explicitly. A fairly simple experiment shows that there is a pronounced exothermic effect when pure acetic acid is added to potassium acetate. Experiments with similar…

Presents eight examples from two elementary school science textbook series of misleading suggestions related to what students should observe during science lessons. Levels and page numbers are given for each example. Questions whether textbook authors have tried and analyzed the experiments they describe. (Author/SK)