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Solutions Homogeneous (Uniform) mixture Homogeneous (Uniform) mixture Solute -- Dissolves Solute -- Dissolves Solvent -- Does the dissolving Solvent -- Does the dissolving Liquid Solvent Liquid Solvent Solid, liquid, or gas solute Solid, liquid, or gas solute Solid Solution -- Alloys Solid Solution -- Alloys Gas solution -- Air Gas solution -- Air

Rates How can we affect how quickly something will dissolve in a solvent? How can we affect how quickly something will dissolve in a solvent? Stirring Stirring Temperature Temperature Size… Size…

Volume = length × width × height Volume = length × width × height Surface Area = length × width × 6 Surface Area = length × width × 6 (for a cube)

Cube Cube 20cm x 20cm x 20cm 20cm x 20cm x 20cm V=? V=? SA=? SA=? V=8000 cm 3 V=8000 cm 3 SA=2400 cm 2 SA=2400 cm 2

8 Cubes 8 Cubes 10cm x 10cm x 10cm 10cm x 10cm x 10cm V=? V=? SA=? SA=? V=8000 cm 3 V=8000 cm 3 SA=4800 cm 2 SA=4800 cm 2

64 Cubes 64 Cubes 5cm x 5cm x 5cm 5cm x 5cm x 5cm V=? V=? SA=? SA=? V=8000 cm 3 V=8000 cm 3 SA=9600 cm 2 SA=9600 cm 2

… Cubes … Cubes 1cm x 1cm x 1cm 1cm x 1cm x 1cm V=? V=? SA=? SA=? V=8000 cm 3 V=8000 cm 3 SA=48000 cm 2 SA=48000 cm 2

Exercise – Calculate Volume and Surface Area 1 Cube 1 Cube 12cm x 12cm x 12cm 12cm x 12cm x 12cm 1 Cube 1 Cube 6cm x 6cm x 6cm 6cm x 6cm x 6cm 8 cubes 8 cubes 6cm x 6cm x 6cm 6cm x 6cm x 6cm 1 Cube 1 Cube 1cm x 1cm x 1cm 1cm x 1cm x 1cm 1728 Cubes 1728 Cubes 1cm x 1cm x 1cm 1cm x 1cm x 1cm 1,728,000 Cubes 1,728,000 Cubes 0.1cm x 0.1cm x 0.1cm 0.1cm x 0.1cm x 0.1cm