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2) Turn to page 369, Fig 2 to help you with this next question . On the left is a flask of liquid called bromthymol bl

SPI 0807.9.12 Acids and Bases . Bellwork. Jan 10, 2013. 1) Turn to page 368 to help you fill in these blanks . (top paragraph) An acid is any ___________ that increases the number of ______________ ions when dissolved in water.

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2) Turn to page 369, Fig 2 to help you with this next question . On the left is a flask of liquid called bromthymol bl

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  1. SPI 0807.9.12 Acids and Bases Bellwork Jan 10, 2013 1) Turn to page 368 to help you fill in these blanks. (top paragraph) An acid is any ___________ that increases the number of ______________ ions when dissolved in water. 2) Turn to page 369, Fig 2 to help you with this next question. On the left is a flask of liquid called bromthymol blue. On the right, this same liquid looks different. What happened? BONUS QUESTION! What is the difference between an atom and an ion? 3) Turn to page 370, Fig 2 to help you with this last question. What are three examples of things we make using acids? 1

  2. Today’s Plan SPI 0807.9.12 Acids and Bases 1) Discuss objective(s), bell work, ask about birthdays. 2) View notes about acids and bases with video clips 3) Pair up and do a review activity 4) Documents to go home Pass out report cards Explore results Jupiter Gradebook 5) Closure: Sketch the difference between an atom and an ion 6) Copy this into your agenda! CWHW: Acid & Bases Double-Door Foldable (see p515) (more details on the next slide) (sign and return) (for parents/bring to school Tues Night/Jan 15th) (for parents to keep) 2

  3. Classwork/Homework SPI 0807.9.12 Acids and Bases • Copy this into your agenda! • CWHW: Acid & Bases Double-Door Foldable (see p515) • Label one outside flap “Acids.” Label the other “Bases.” • On the inside flaps for each write 3 properties of each • Acid properties-see ps368 to 370 • Base properties-see ps371 to 372 • On the inside middle area write a list of 3 ways we use acids • and then write another list of 3 ways we use bases. (Two lists!) • Acid uses-see page 370 • Base uses-see page 373 • Write you first/last name, date, and period on the back • Silly Thought  • Doesn’t expecting the unexpected make the unexpected expected? • Silly Thought! • I went to a 7-11 and asked for a 2 by 4 and box of 3 by 5’s. • The clerk said “ten-four”  3

  4. Bases SPI 0807.9.12 Acids and Bases Notes 4 What are they? Any compound that increases the number of Hydroxide ions (OH-) when dissolved in water (H2O) …have a bitter flavor, feel slippery., often are corrosive. …can conduct electricity because of the negative charge on the Hydroxide ion (OH-). …commonly found in everyday life, Example: Sodium Hydroxide (NaOH) is the base used to make soap.

  5. Base Uses SPI 0807.9.12 Acids and Bases Notes 5 • Toothpaste • Detergent • Ammonia (NH3) • Milk of Magnesia

  6. Base characteristics SPI 0807.9.12 Acids and Bases Notes • -Bases turn Red litmus paper Blue. • -Acids turns Blue litmus paper Red 6 • Bases are greater than seven (7) on the pH scale.

  7. The pH scale SPI 0807.9.12 Acids and Bases Notes 7 -pH scale: a way to determine the level of acidity or basicity of a substance. -Acids are 0 to 6.9 &bases are 7.1 to 14 on the pH scale -7 is neutral (pure water is 7)

  8. SPI 0807.9.12 Acids and Bases Notes Bases and Indicators • Bases Change Colors in Indicators • A substance that changes color in the presence of an acid or base is an indicator. 8

  9. Bases: Review Questions 9 • Q: Bases are compounds that increase the number of what kind of ion? • A: Hydroxide • Q: What flavor does a base typically have? • A: Bitter • Q: Name 2 or more uses of a base… • A: Toothpaste, detergent, ammonia, milk of magnesia • Q: What color does a base turn red litmus paper? • A: BLUE • Q: On the pH scale what number are bases? • A: 7 to 14 (7 is neutral)

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