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Acids/Bases and the pH Scale

Acids/Bases and the pH Scale. Properties of Acids and Bases. Acid, Base, Neutral, or Both (Acid and Base). 1. pH of 7 _______________________________ 2. ammonia _____________________________ 3. fluid in the stomach ____________________ 4. produces hydrogen gas __________________

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Acids/Bases and the pH Scale

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  1. Acids/Bases and the pH Scale

  2. Properties of Acids and Bases

  3. Acid, Base, Neutral, or Both (Acid and Base) • 1. pH of 7 _______________________________ • 2. ammonia _____________________________ • 3. fluid in the stomach ____________________ • 4. produces hydrogen gas __________________ • 5. NaOH or KOH _________________________ • 6. saliva in the mouth ______________________ • 7. conduct electricity ______________________ • 8. pH 0 – 6.9 ______________________________ • 9. vinegar ________________________________ • 10. pH 7 - 14 ______________________________ • 11. HCl ___________________________________ • 12. produce ions in water ______________________

  4. Answers • 1. neutral 10. base • 2. base 11. acid • 3. acid 12. both • 4. acid • 5. base • 6. neutral • 7. both • 8. acid • 9. acid

  5. Vocabulary • 1. An ________ is a compound that changes color in the presence of an acid or base. • 2. This property of an acid can “eat away” certain metals_____________ • 3. The ________ is a series of numbers that indicates the concentration of hydrogen ions in a solution. • 4. A _______ is an ionic compound that forms from the reaction of an acid and a base.

  6. 5. At a pH near ________ stomach enzymes break down proteins. • 6. During the neutralization process _______ and ________ is produced. • 7. The process that breaks down complex molecules of food into smaller molecules is called________. • 8. ____________ is the reaction between an acid and a base. • 9. _________ digestion is a physical process in which large pieces of food are torn and ground into smaller pieces. • 10. Most chemical digestion is completed in the ___.

  7. Vocabulary Answers • 1. indicator • 2. corrosive • 3. pH scale • 4. salt • 5. 2 (two) • 6. salt and water • 7. digestion • 8. Neutralization • 9. Mechanical • 10. small intestines

  8. pH Scale • Range 0 – 14 • Acids 0 – 6.9 (lower the number, stronger the acid) • Bases 7.1 – 14 (higher the number, stronger the base) • Neutral 7

  9. Acid / Base Reactions Acids in water produce? 1. HCl Bases in water produce? 2. NaOH Acids and bases (neutralization) produce? 3. HCl + NaOH

  10. Acid / Base Reaction Answers • 1. H+ + Cl- • 2. Na+ + OH- • 3. H2O + Na+ + Cl-

  11. More Practice! • HCl + KOH  • HF  • LiOH  • HF + LiOH  • HBr  • KOH  • HCl + LiOH 

  12. Answers • HCl + KOH  KCl + H2O • HF  H+ + F- • LiOH  Li+ + OH- • HF + LiOH  LiF + H2O • HBr  H+ + Br- • KOH  K+ + OH- • HCl + LiOH  LiCl + H2O

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