Scribe Author: Georgia A
Intensive Properties vs. Extensive Properties
Intensive Properties
- Do NOT depend on how much you have
- DOES depend on what the substance is
(Ex: Density, Solubility)
Extensive Properties
- DO depend on how much you have
- Does NOT depend on what it is
(Ex: Mass, Volume)
Density = __Mass__ (extensive) unit = grams
(Intensive) Volume (extensive) unit = mL
*Density is a derived unit = grams/mL
Help With Calculations.....
M (Mass) = D x V
D (Density) = M / V
V (Volume) = M / D
OR
In the lab, we will not measure density directly. We will measure.......
Mass
- Find using a balance (digital scale)
Volume
- Find 2 different ways
1. Regular objects
length x width x height
* 1㎤ = 1mL
2. Irregular Object
Use water displacement
Ending Volume - Starting Volume = Volume of the object
A Few Extra Tips.....
- Density is a physical property
- Water has a density of 1g/mL (same as 1g/㎤)
- Less dense things float on top of more dense things
Beverage Lab Prelab Questions
1. 3 sig figs
2. 12.53 g = 1.52 g/mL
8.27 mL
3. 49 g (sugar) d= 1.043 g/mL
355 mL (beverage) % sugar concentration
(g sugar / g beverage) x 100
Turn this into grams and use
density to do it!
M = D x V
M = 1.043 g/mL x 355mL _ 49g sugar x100 = 13%
M = 370 g beverage 370 g beverage
next scribe post author: Kevin G.
