Water Properties
Water is known as a universal ______________.
Solvent
Rain and snow _________________ onto land.
precipitate
Solid, Liquid, Gas
What side of the pH scale do acids fall on? (greater than or less than 7)
Less than 7
Specify which property is of an acid and which is of a base.
Tastes sour
Tastes bitter
Tastes bitter = Base
Water's property of _____________ allows bugs to float on the surface of water.
Surface tension
Run off
What physical change occurs when water turns from liquid to gas?
Evaporation
What side of the pH scale to bases fall on? (greater than or less than 7)
Greater than 7
True or False:
Both acids and bases can be strong electrolytes.
True
What property of water allowed the colored water to move up the paper towels into the glass beside it in one of our labs?
Capillary action
________________ is when water vapor cools and changes back into liquid form.
Condensation
What physical change occurs when water turns from solid to liquid?
Melting
What is the pH of pure water?
7
Pick acids, bases, or both:
Can be dangerous and harmful to your skin.
Both acids and bases.
What is the chemical formula for water?
H2O
Water from the land and ocean _____________ into the air.
What physical change occurs when water turns from solid to gas?
Sublimation
What type of paper can be used to test the pH of a substance?
1. __________ produce hydrogen ions when dissolved in water.
2. __________ produce hydroxides ions when dissolved in water.
1. Acids
2. Bases
What properties of water allowed for the oil to float on top of water during our lava lamp lab?
Polarity - don't mix
Density - oil is less dense than water
When plants open their pores for carbon dioxide and lose water to evaporation this is called ______________.
transpiration
What physical change occurs when water turns from gas to solid?
Deposition
True or False:
1. Orange juice would have a pH of about 7
2. Soap would have a pH of about 9-10.
1. False, acid so less than 7, about 3-4
2. True
1. _________ turn blue litmus paper red.
2. _________ turn red litmus paper blue.
1. Acids
2. Bases