Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Acid & base


Published on

Published in: Education, Business, Technology
  • Be the first to comment

  • Be the first to like this

Acid & base

  1. 1. By : Siti Auliaddina
  2. 2. Do you know the definition of acids and bases in general ?
  3. 3. Produce H+ (as H3O+) ions in waterProduce a negative ion (-) tooTaste sourCorrode metalsReact with bases to form salts and water
  4. 4.  Produce OH- ions in water Are electrolytes Feel soapy, slippery React with acids to form salts and water LecturePLUS Timberlake 4
  5. 5. • Used for acid and bases in solution (neutralization)• Cations (positive ions) derived from the bases and anions (negative ions) derived from acid• Salt: compounds which can remove ion of• H + positive and negative ion of non OH-
  6. 6.  Acids produce H+ in aqueous solutions water HCl H+(aq) + Cl- (aq) Bases produce OH- in aqueous solutions water NaOH Na+(aq) + OH- (aq)
  7. 7. • In this idea, the ionization of an acid by water is just one example of an acid-base reaction. H H + Cl H + O HO + Cl H H acid base conjugate acid conjugate base conjugate acid-base pairs• Acids and bases are identified based on whether they donate or accept H+.• “Conjugate” acids and bases are found on the products side of the equation. A conjugate base is the same as the starting acid minus H+.
  8. 8. Arrehenius  Acids – produce H+ only in water  Bases - produce OH-  Acids – donate H+ Bronsted-Lowry  Bases – accept H+ any solvent Lewis  Acids – accept e- pairused in organic chemistry,  Bases – donate e- pairwider range of substances
  9. 9. Acid, Base Name or SaltCaCl2 ______ _________________KOH ______ _________________Ba(OH)2 ______ _________________HBr ______ _________________H2SO4 ______ __________________
  10. 10.  The pH scale measures how acidic or basic a solution is.
  11. 11.  The pH scale is the concentration of hydrogen ions in a given substance. pH log H
  12. 12.  Acids have a ph from 0-7 Lower pH value indicates a stronger acid. Bases have a pH from 7-14 Higher pH value indicates a stronger base.
  13. 13. Strong acids/bases – 100% dissociation into ions HCl NaOH HNO3 KOH H2SO4Weak acids/bases – partial dissociation, both ions and molecules CH3COOH NH3 Weak Acid Weak Base
  14. 14. pH of Rainwater across United States in 2001 You are here!Why is the eastern US more acidic?
  15. 15. Dissolved carbon dioxide lowers the pHCO2 (g) + H2O  H2CO3  H+ + HCO3-Atmospheric pollutants from combustionNO, NO2 + H2O …  HNO3 both strong acidsSO2, SO3 + H2O …  H2SO4 pH < 5.3