Certainly! Here is a filled-in version of your study guide based on the concepts you provided.
name: 260219_
class: 2nd_hour
date: 9/26/24
section 2: property's allow life to exist on earth
study guide B
key concept: water's unique properties allow life to exist on earth.
vocabulary
hydrogen bond, solution, acid, cohesion, solvent, based, adhesion, solute, pH
main idea: life depends on hydrogen bonds in water.
-
What is a polar molecule?
A polar molecule is a molecule that has a slight positive charge on one end and a slight negative charge on the other end due to the unequal sharing of electrons. -
Explain why water is a polar molecule.
Water is a polar molecule because the oxygen atom is more electronegative than the hydrogen atoms, causing the electrons to be drawn closer to the oxygen and creating a partial negative charge on it and a partial positive charge on the hydrogens. -
What is a hydrogen bond?
A hydrogen bond is a weak attraction that occurs between the positive end of one polar molecule (specifically hydrogen) and the negative end of another polar molecule. -
Describe where a hydrogen bond came from among water molecules.
A hydrogen bond forms between the hydrogen atom of one water molecule and the oxygen atom of a neighboring water molecule.
Complete the table by writing short 1 sentence descriptions about the properties of water:
| property | description | |-------------------|-------------------------------------------------------------------------| | high specific heat | Water has a high specific heat, meaning it can absorb a lot of heat before its temperature changes significantly. | | cohesion | Cohesion is the property that allows water molecules to stick to each other due to hydrogen bonding. | | adhesion | Adhesion is the property that causes water molecules to stick to other substances, allowing phenomena like capillary action. |
study guide B continued
main idea: many compounds dissolve in water.
-
What is the difference between a solvent and a solute?
A solvent is a substance that dissolves a solute, while a solute is a substance that is dissolved in a solvent. -
What type of substances dissolve easily in water?
Ionic compounds and polar molecules generally dissolve easily in water due to their interactions with water's polar nature. -
What types of substances do not dissolve in water easily?
Nonpolar substances, such as oils and fats, do not dissolve in water easily because they do not interact favorably with the polar molecules of water.
Feel free to adjust any parts or ask if you need further information!
1 answer