IONIC COMPOUNDS: ACIDS AND BASES Acids and Bases are __________________ that have very distinct properties. ____________ + ____________ ___________ + __________ _____________ __________ + ___________ WATER Before understanding Acids and Bases, you must understand water. It is a ________________________________. Like a ________________. It is a polar molecule. WHY??? _____________________________________________________________________________ Oxygen =_______________________________________________________. Because water is POLAR (negative side and positive side), what types of compounds will it DISSOLVE easily? ______________________________ Acids •Acids: ______________________________________________________________________________ __________ + __________ _________ + _______ •Written also as: ________ _______ + _______ When _________ is put in _____________, a __________________________________, ____________ (hydrogen ion, H1+) is formed. Why might acids be referred to as “PROTON DONORS”? 1 Acids ARE “___________________________________” Characteristics of Acids 1. __________________________________ 2. ________________________________________________________________________ 3. _______________________ 4. ________________________________________ 5. ________________________________________________ Bases •Bases: ______________________________________________________________________________ ___________ _________+ _________ Bases are ________________________________ that break apart (________________) in __________ to form a negatively charged ________________________________ (__________). Why might bases be referred to as “PROTON ACCEPTORS”? Bases ARE “___________________________________” 2 Characteristics of Bases 1. _____________________________________ 2. _____________________________________ 3. _____________________________________ 4. _____________________________________ 5. _____________________________________ Strength of Acids and Bases WHY is battery acid MORE ACIDIC? ___________________________________________________ How many hydronium ions are in the strong acid? In the weak acid? Chemists use a _______________________________________________ to describe the concentration (____________________) __________________________________ (____________) ions in a solution. This is the __________________________ The _______ of a solution is a _______________________ of the _______________________________ (___________) concentration. _______________________ substances have a value of ________ Their number of ______________________________________________________________________ Distilled Water is _____________________ It’s _______________________________ equal it’s _____________________________ This is because water ____________________ slightly. 3 Acids have a pH value of _______________________________________ Bases have a pH value of ______________________________________ Strength of Acids and Bases What is the difference between the strong and the weak, regardless of concentration? Strong substances ____________________________________________________________ How do you get strong and weak acids and bases? STRONG ACIDS/BASES COMPLETELY IONIZE/DISSOCIATE • HCl + H2O H3O+1 + Cl-1 – Reaction only goes ________________________________ WEAK ACIDS/BASES _______________________________________________________ • NH3 + H2O NH4+1 + OH-1 – Reaction goes __________________________. Not all of the compound ionizes. 4 pH H3O=1 concentration H3O=1 concentration When ______________________________________, the process is called ______________________. They react to form __________________________________________________________________ ___________________ + ________________ ______________ + ________________ __________ + __________ _________ + ___________ 5 ACIDS AND BASES AND NEUTRALIZATION One of the most important aspects of a living system is the ___________________________________ _____________________________________ • Control of pH is very important • Control is accomplished with ______________________ • Buffers _________________________________________________________________ • Alkalinity – _____________________________________________________________ 6