Water

Unique Only natural substance found in all 3 states at Earth’s normal temperatures. What are the 3 states and where are they at?

Properties Freezes at 32° F Boils at 212° F Ice is less dense than liquid water, so that’s why ice floats Pure water is neutral ph=7 Highly cohesive—very sticky

Properties cont’d High specific heat index—absorbs a lot of heat before it begins to get hot Helps to regulate the rate at which air changes temperature, why temperature change between seasons is gradual not sudden

Properties cont’d High surface tension—sticky and elastic and tends to clump together rather than spread out in a thin film Universal solvent—dissolves more substances than any other liquid

Water looks like what? Polar arrangement of oxygen and hydrogen atoms-one side (hydrogen) has a positive charge and the other side (oxygen) has a negative charge.

Why does salt dissolves in water? Water and salt are both polar molecules, positive and negative charges on both sides of the molecule The sodium is a positive charge and the chloride is a negative charge