Elements and Compounds
Properties of Water
Properties of Solutions
Effects of dissolution
Thermal Equilibrium
Acids and Bases
100
A substance containing only one type of atom is called a(n):
Element
100
What are the 3 properties of water?
cohesion, adhesion, and surface tension
100
A solution where water is the solvent.
Aqueous Solution
100
What would be considered the solvent and the solute in kool aid?
Solvent- water
solute- kool aide powder
100
Heat moves from ______ to _______.
hot to cold.
100
When a substance is neutral and does not change the color litmus paper, it has a pH level of _____.
seven
200
A compound is _______ type(s) of atom(s).
two or more
200
If a paperclip is able to float on water, that is an example of ________.
surface tension
200
The part of the solution that does the dissolving.
Solvent
200
The term to describe how fast something dissolves.
Rate of dissolution
200
If a substance is cooled down, what will happen to the kinetic energy of the particles?
the particles will slow down.
200
Based on the picture, is the substance an acid or base?
Acid
300
How many elements are in H2OCl3Na
4 Elements
300
When water molecules are attracted to one another, that is considered ___________.
cohesion
300
Creamer dissolving in coffee is an example of a _____.
Solution
300
To bother or to stir a solution.
Agitation
300
What is the kinetic energy (motion) of a solution if the temperature of a solution is hot?
High kinetic energy (fast motion)
300
True or False: Pure water is the ONLY neutral substance on the pH scale.
True!
400
What is the difference between an element and a compound?
Element is one type of atom and Compound is 2 or more types of atoms
400
When the water molecules are attracted to other molecules, it is considered ________.
adhesion
400
What is it called to form a solution by mixing evenly?
Dissolve
400
2g of sugar is placed into a glass of cold water and also into a glass of warm water. Which glass will have the fastest rate of dissolution?
Warm water
400
When does heat stop moving?
When it has reached equilibrium (when the temperature of both objects are the same.
400
If the pH is above 7, it is considered a _______.
basic
500
Identify the elements in the compound and how many atoms of each element.
C2H8Cl6O
Carbon-2
Hydrogen-8
Chlorine-6
Oxygen-1
500
How does cohesion help a water strider, "walk" on water?
the water molecules stick together under the bug, not allowing the water strider to break through.
500
Adding water to sweet tea in order to reduce the sweetness is an example of ____.
Dilution
500
What two factors affect the rate of dissolution?
Temperature and Surface Area
Agitation and Concentration
500
Explain what happens to the temperature and the kinetic particles if heat is applied to a flask overtime.
the temperature will rise and the particles will move faster.
500
Give at least 3 characteristics of an acid.
- has a pH lower than 7
- has a sour taste
- turns the litmus paper red
- has a sour taste
- corrosive
- can be found in both foods and nonfoods