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SOLUTIONS AND PRECIPITATES. What mixes, what doesn’t and Why. MIXTURES: 1 + 1 = 2 or Does It?. Add 50 mL of H 2 O to 50 mL of H 2 O ⃗ 100 mL Mixture Add 50 mL of H 2 O to 50 mL of MeOH i.e Water + Methanol (Methyl Alcohol) ⃗ ?? mL Mixture. WHY?. IONIC SPECIES IN SOLUTION.
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SOLUTIONS AND PRECIPITATES • What mixes, what doesn’t and Why
MIXTURES: 1 + 1 = 2or Does It? • Add 50 mL of H2O to 50 mL of H2O • ⃗ 100 mL Mixture • Add 50 mL of H2O to 50 mL of MeOH • i.e Water + Methanol (Methyl Alcohol) • ⃗ ?? mL Mixture. WHY?
IMAGING INTERNAL X-RAYS • Need DENSE material to Block X-Rays (BaSO4) • 2BaCl + Na2SO4→Ba2SO4 + 2NaCl • Note: Ba2SO4 is VERY INSOLUBLE in WATER
DISAPPEARING ORANG E REACTION: Now You See It, Now You Don’t ! • Solution A – Potassium Iodide (KI) in H2O • Solution B – Mercuric Chloride (HgCl2) in H2O
DISAPPEARING ORANG E REACTION: Now You See It, Now You Don’t ! • Questions: • Is this a REDOX Reaction? • How can you explain the disappearance of the Orange Color?
DISAPPEARING ORANG E REACTION: Now You See It, Now You Don’t ! • 1.Hg2+ + 2I-⇒HgI2 (Orange) • 2. HgI2 + 2I-⇒ HgI42- (Colorless)
MIXTURES: 1 + 1 = 2or Does It? • Add 50 mL of H2O to 50 mL of H2O • ⃗ 100 mL Mixture • Add 50 mL of H2O to 50 mL of MeOH • i.e Water + Methanol (Methyl Alcohol) • ⃗ ?? mL Mixture.
