This form of assessment is often referred to as evaluation (see section below on Assessment versus Evaluation). Learner assessment represents a particular type of educational assessment normally conducted by teachers and designed to serve several related purpose (Brissenden and Slater, n.d.).
the formula of borax is Na2B4O7Â·10H2O or alternatively to make the structure more explicit, Na2[B4O5(OH)4]Â·8H2O. It is usually called sodium tetraborate decahydrate or diso â¦ dium tetraborate decahydrate. Liam Frayne.
Boric acid or boracic acid is an acid which can be derived from borax. The chemical structure is: H3BO3. It also occurs naturally. It is more toxic than borax. Boron, a valuable trace metal derived from foods and soils, is quite toxic in excess. In fact, it is so toxic that it can be used as a herbicide.