CHM110H5 Lecture Notes - Sodium Hydroxide, Chief Operating Officer, Titration
Document Summary
Trifluoracetic acid is stronger than trichloracetic acid because it contains fluorine substitutes which are more electronegative than chlorine atoms. This causes a major difference between the electronegative charges between the atoms which results in easy dissociation of hydrogen from the acid to bond with water molecules and form h+ ions. The strength of a compound can be categorized by its ability to donate h+ ions and the acidic strength of the compound will easily donate h+. In the case of carboxylic group r cooh, when it donates a proton, it becomes r . Elements such as cl and f, whose electro negativity is very high, will put a partial positive charge on o-, which will stabilize the negative charge. Acid-base indicators (also known as ph indicators) are substances that change color with ph and are used to detect the equivalence points of a titration. The end point of the indicator should be close to the equivalence point of titration.