Acids bases

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Acids bases

  1. 1. Acids, Bases and the pH scale
  2. 2. pH scale pH stands for “potential of Hydrogen” The pH scale is a range of values from 0-14 that express the concentration of hydrogen ions in a solution. The more hydrogen ions, the lower the number on the pH scale.
  3. 3. Acids & Bases on the pH scale Acids range from 0-6.9 Acids have the most amount of hydrogen ions. Bases range from 7.1-14 Bases have the least amount of hydrogen ions. 7 on the scale is pH neutral (neither an acid nor a base)
  4. 4. Acids An Acid is a chemical compound, that, when dissolved in water has a pH of less than 7. Acids taste sour, react with metals and carbonates and will turn blue litmus paper red. Acids are corrosive- they eat away at other materials, especially metals. Acids contain Hydrogen ions (H+)
  5. 5. Bases Bases are chemical compounds that, when dissolved in water, have a pH of above 7. Bases taste bitter, feel slippery and turn red litmus paper blue. Bases are corrosive- they also eat away materials (Acids are NOT the only dangerous substances on the pH scale!!) Bases contain Hydroxide ions (OH-)
  6. 6. Uses for Acids: Acids are naturally in many of the foods we eat :Tomatoes, lemons, oranges, and even leafy green veggies! Acids are also used in many fertilizers. Acids can also be found in most batteries
  7. 7. Uses for Bases Cement is made using bases Many cleaning solutions used in the home are bases (drain cleaner, glass cleaner, bleach, soap) Bases can also be found in baked goods such as breads, cakes, and cookies!
  8. 8. Neutralizing Acids & Bases The reaction between acids and bases is a called neutralization. The neutralization of acids and bases depends on the identities, volumes and concentrations of the reactants. Salt and water will form as a result of acids and bases neutralizing completely.
  9. 9. Who likes sour candy????

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