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Solutions Slide 2 G Solutions are uniform mixtures of two or more substances. G Homogenous (Hom-mogdge-genis) means that the solution is the same throughout! G Solutions are uniform mixtures of two or more substances. G Homogenous (Hom-mogdge-genis) means that the solution is the same throughout! A uniform: all the same. Slide 3 G An aqueous solution: G aqua is Latin for water! G Solutions that are made of water are referred to aqueous solutions. G An aqueous solution: G aqua is Latin for water! G Solutions that are made of water are referred to aqueous solutions. Slide 4 Electrolytes G Water has slight electrical charges at either end which help it dissolve many substances by attaching themselves to the particles. G Some substances are made from charged particles called ions. Eg Salt (NaCl). When water separates these particles they can carry an electrical current through the water. G This solution is now a conductor G Water has slight electrical charges at either end which help it dissolve many substances by attaching themselves to the particles. G Some substances are made from charged particles called ions. Eg Salt (NaCl). When water separates these particles they can carry an electrical current through the water. G This solution is now a conductor Slide 5 Electrolytes G This solution is now a conductor and is called an electrolyte G If It is a solution and it does not conduct it is a non-electrolyte G This solution is now a conductor and is called an electrolyte G If It is a solution and it does not conduct it is a non-electrolyte Slide 6 Immiscible or Miscible G Sometimes solutions can be formed when two liquids are mixed completely into each other. G Eg ethanol will mix with water G These liquids are said to be miscible G Sometimes solutions can be formed when two liquids are mixed completely into each other. G Eg ethanol will mix with water G These liquids are said to be miscible Slide 7 Immiscible G If they do not mix but form layers than they are said to be immiscible. The more dense liquid will go to the bottom. G Eg oil will float on water. G If they do not mix but form layers than they are said to be immiscible. The more dense liquid will go to the bottom. G Eg oil will float on water. Slide 8 Solvents other than water Slide 9 Oil/water/detergent demo Describe your observations: G When oil and water were mixed G When detergent was added G When it was shaken G What was happening? G When oil and water were mixed G When detergent was added G When it was shaken G What was happening? Slide 10 Hydrocarbon Slide 11 End Describe in a few sentences how detergent helps dissolve grease Slide 12 Some other solvents G Ethanol- dissolves mostly the same things as water G Many solvents are made of petroleum- Degreasers clean engines G Turpentine- removes paint G Nail polish remover G Caustic Soda (NaOH) turns grease into soap G Ethanol- dissolves mostly the same things as water G Many solvents are made of petroleum- Degreasers clean engines G Turpentine- removes paint G Nail polish remover G Caustic Soda (NaOH) turns grease into soap Slide 13 Questions 1. Why would we not want nail polish to dissolve in water? 2. How does caustic soda unblock drains? 3. Suggest a suitable solvent for: G Nail polish G Bike grease G Engine grease 1. Why would we not want nail polish to dissolve in water? 2. How does caustic soda unblock drains? 3. Suggest a suitable solvent for: G Nail polish G Bike grease G Engine grease