Composition of Water
The use of electricity to break a molecule down into smaller units.
What is Electrolysis?
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
What is a polar molecule?
A liquid substance capable of dissolving other substances.
What is a solvent?
Water that has certain dissolved ions in it.
What is hard water?
The charge on the terminal of the 9v battery in Ex 4.1 with the larger volume of liquid
What is negative?
The chemical formula for water.
What is H20?
The substance type that does not dissolve in water.
What is nonpolar?
The 2 types of substances that water will dissolve.
What are polar & ionic?
2 Dissolved ions that make water hard.
What are calcium and magnesium?
A possible cause for when an experiment does not work perfectly.
What is experimental error?
The reason water is a liquid at room temperature when all other chemically similar substances are gasses at room temperature. This also makes the surface tension of water larger than that of many other substances.
What is hydrogen bonding?
A molecule that has no overall charge because there is not an imbalance in the way electrons are shared.
What is a nonpolar molecule?
The substance added to a water softener that helps it do its job.
What is salt?
The charge on the terminal of the 9v battery in Ex 4.1 with the smaller volume of liquid
What is positive?
True or False: In a water molecule the Oxygen atom is slightly negative and the Hydrogen atoms are slightly positive.
True: Since the Oxygen atom is slightly stronger it "pulls" more on the electrons, making it slightly negative and leaving the Hydrogen atoms slightly positive.
The phenomena that occurs when individual molecules are so strongly attracted to each other that they tend to stay together, even when exposed to tension.
What is cohesion?
True or False: Nonpolar liquids will not dissolve ionic or polar substances.
What is TRUE?
True or False: Hard water is the result of a city's water treatment process.
What is FALSE?
When other scientists look closely at the experimental procedural of another scientist to make sure there were no errors their experiment.
What is a peer review?
Water molecules fighting being pushed away from each other due to hydrogen bonding and their own polarity.
What is cohesion?
The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.
What is surface tension?
The type of liquid that will dissolve a nonpolar substance.
What is nonpolar?
The cause of hard water.
What are dissolved metal ions?
True or False: All substances have electrical charges in them.
What is TRUE?