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Fold piece of paper in half lengthwise (hot dog style)

Fold piece of paper in half lengthwise (hot dog style) Cut where shown by the dotted lines, a 1-inch strip in the middle of bottom half. ACIDS. Neutral. BASES. Strong. Weak. Weak. Strong. 0 1 2 3 4 5 6. 7. 8 9 10 11 12 13 14. ACIDS (pH 0 to 6)

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Fold piece of paper in half lengthwise (hot dog style)

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  1. Fold piece of paper in half lengthwise (hot dog style) • Cut where shown by the dotted lines, a 1-inch strip in the middle of bottom half

  2. ACIDS Neutral BASES Strong Weak Weak Strong 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

  3. ACIDS (pH 0 to 6) • Aqueous solutions have a sour taste • Turn Litmus paper RED • React with active metals to release hydrogen gas (H2) • React with bases to produce salts and water (H2O) • Acids conduct electric currents • Ex) Lemon juice, vinegar, soft drinks

  4. Neutral (pH =7) • “pure” water (H2O) • Equal number of H+ and OH- ions

  5. Bases (pH 8 to 14) • Aqueous solutions of bases taste bitter • Turn Litmus paper BLUE • Aqueous solutions feel slippery • React with acids to produce salts and water • Bases conduct electric currents • Ex) Soap, ammonia, bleach, oven cleaner

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