Mass & Density
What is the formula for density?
D = Mass/Volume
What kind of bond connects water molecules?
Hydrogen Bond
A mixture where one substance is dissolved in another is called _______?
A solution
Acid
What numbers does the pH scale cover?
0/1 - 14
What are mass & volume measured in? (What units?)
Mass - Grams
Volume - Liters
What is it called when water sticks to itself? What is it called when water sticks to something else?
Cohesion, Adhesion
If you have a glass of salt water, what is the solute and what is the solvent?
Solute - Salt
Solvent - Water
What is the pH of water?
7 (Neutral)
What kind of pH does an acid have? What kind of pH does a base have?
Acid - anything less than 7
Base - anything greater than 7
What do you use to measure mass?
Scale, balance
What allows water striders to walk on water?
Surface Tension
A mixture of particles that don't dissolve in water is a _________
Suspension
Acids - Sour
Bases - Bitter
What do we use to tell if something is an acid or a base?
If an object has a volume of 100 mL and a mass of 3,500 grams, what is the density? (Use units in your answer)
35 g/mL
What is capillarity and why is it important for plants?
Water's ability to climb up thin tubes, it moves water from roots to leaves
What is a solution called when water is the liquid?
Aqueous
If you have a very strong acid, what pH could it have?
A lower pH
What prevents changes in pH?
Buffers
If 2 objects have the same volume but different masses, which one has a higher density?
Example: Object 1 - Volume = 20mL Mass = 80g, Object 2 - Volume = 20mL Mass = 140g
The object with the larger mass
Why is water a good thermal buffer?
It has a high heat capacity, it takes a lot of heat to change the temperature of water
How do you know a solution is saturated?
No more of the solute will dissolve
What is another word for base?
Alkaline
Explain how litmus paper works to show if something is an acid or a base
If blue litmus paper turns red, it's an acid
If red litmus paper turns blue, it's a base