Physical Science, module 4 Flashcards
Between which two atoms do hydrogen bonds form?
Hydrogen and oxygen.
Define “polar molecule”.
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
Define “solvent”.
A liquid capable of dissolving other substances.
Define “solute”.
A substance that is dissolved in a solvent.
What types of molecules can be dissolved in water?
Ionic and polar molecules.
Define “cohesion”.
The phenomenon that occurs when individual molecules are so strongly attracted to each other that they stay together, even when exposed to tension.
Define “hard water”.
Water that has certain dissolved ions in it, predominantly calcium ions.
Define “electrolysis”.
Using electricity to break a molecule down into its constituent elements.
Which is denser, liquid water or ice?
Liquid water, because the molecules are held together by hydrogen bonds.
What type of molecules do nonpolar liquids dissolve?
Other nonpolar substances.
