The use of electricity to break a molecule down into smaller units.
What is Electrolysis?
100
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
What is a polar molecule?
100
A liquid substance capable of dissolving other substances.
What is a solvent?
100
Water that has certain dissolved ions in it.
What is hard water?
100
The charge on the larger terminal of the 9v battery in Ex 4.1.
What is negative?
200
The chemical formula for water.
What is H20?
200
The substance type that does not dissolve in water.
What is nonpolar?
200
The 2 types of substances that water will dissolve.
What are polar & ionic?
200
2 Dissolved ions that make water hard.
What are calcium and magnesium?
200
A possible cause for when an experiment does not work perfectly.
What is experimental error?
300
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?
300
A molecule that has no overall charge because there is not an imbalance in the way electrons are shared.
What is a nonpolar molecule?
300
A substance that is dissolved in a solvent.
What is a solute?
300
The substance added to a water softener that helps it do its job.
What is salt?
300
The charge on the smaller terminal of the 9v battery in Ex 4.1.
What is positive?
400
The gas released in Ex 4.1 from the larger/negative terminal.
What is hydrogen?
400
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?
400
True or False:
Non polar liquids will not dissolve ionic or polar substances.
What is TRUE?
400
True or False:
Hard water is the result of a city's water treatment process.
What is FALSE?
400
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?
500
The cause of surface tension in any substance other than water.
What is cohesion?
500
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?
500
The type of liquid that will dissolve a nonpolar substance.
What is nonpolar?
500
The cause of hard water.
What are dissolved metal ions?
500
True or False:
All substances have electrical chargers in them.