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Acids and Bases

Acids and Bases. Properties of Matter. AM CARRIER. Acids. Produce H + ions in water Turns litmus paper RED Taste sour, Feel squeeky Corrode materials Conduct Electricity React with bases to form salts and water Measure 0-6 on the pH scale . Some Common Acids.

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Acids and Bases

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  1. Acids and Bases Properties of Matter AM CARRIER

  2. Acids • Produce H+ ions in water • Turns litmus paper RED • Taste sour, Feel squeeky • Corrode materials • Conduct Electricity • React with bases to form salts and water • Measure 0-6 on the pH scale

  3. Some Common Acids HCl hydrochloric acid (stomach) H2CO3 carbonic acid (acid rain) H3PO4 phosphoric acid (Coca Cola) H2SO4 sulfuric acid (Batteries) CH3COOH acetic acid (Pickles)

  4. Bases • Produce OH- ions in water • Turns Litmus Paper BLUE • Taste bitter, chalky • Feel soapy, slippery • Also conduct electricity • React with acids to form salts and water • Measure 8-14 on the pH scale

  5. Some Common Bases NaOH sodium hydroxide (DRANO) KOH potassium hydroxide (Tie Dye) Na2CO3 sodium carbonate (baking soda) Mg(OH)2magnesium hydroxide (MOM) Al(OH)3 aluminum hydroxide (TUMS)

  6. pH Scale(potential of Hydrogen) Lots of H+ IONS Lots of OH- IONS Few to NO IONS

  7. ACTIVITY DIRECTIONS • Observe: Which samples are acids & which are bases? • Hypothesis: Discuss with your group. • Experiment: Take a clean Qtip and insert it into the solution. Wipe it onto the paper. If it is a Base, it will turn the paper orange; if its an acid, it will erase the orange mark. Test all six substances. • Conclusion: Which are acids & which are bases?

  8. Learning Check 1 Describe the solution in each of the following as: 1) acid 2) base or 3)neutral. A. ___soda B. ___soap C. ___coffee D. ___ wine E. ___ water F. ___ grapefruit

  9. Solution 1 Describe each solution as: 1) acid 2) base or 3) neutral. A. _1_ soda B. _2_ soap C. _1_ coffee D. _1_ wine E. _3_ water F. _1_ grapefruit

  10. Learning Check 2 Identify each as characteristic of an A) acid or B) base ____ 1. Sour taste ____ 2. Produces OH- in aqueous solutions ____ 3. Chalky taste ____ 4. Is corrosive ____ 5. Produces H+ in aqueous solutions

  11. Solution 2 Identify each as a characteristic of an A) acid or B) base _A_ 1. Sour taste _B_ 2. Produces OH- in aqueous solutions _B_ 3. Chalky taste A4. Is an electrolyte _A_ 5. Produces H+ in aqueous solutions

  12. Learning Check 3 Match the formulas with the names: A. ___ HNO21)hydrochloric acid B. ___ Ca(OH)2 2) sulfuric acid C. ___ H2SO4 3) sodium hydroxide D. ___ HCl 4) nitrous acid E. ___ NaOH 5) calcium hydroxide

  13. Solution 3 Match the formulas with the names: A. _4__ HNO21)hydrochloric acid B. _5__ Ca(OH)2 2) sulfuric acid C. _2__ H2SO4 3) sodium hydroxide D. _1__ HCl 4) nitrous acid E. _3__ NaOH 5) calcium hydroxide

  14. Arrhenius Acids and Bases • Acids produce H+ in aqueous solutions water HCl H+(aq) + Cl- (aq) • Bases produce OH- in aqueous solutions water NaOH Na+(aq) + OH- (aq)

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