Chemistry 11 Lesson 1.1
Defn Chemistry is the study of matter [mass(g), volume (cm3,mL). mass/volume=density (g/cm3)]
Matter is identified by describing and measuring characteristic properties:
-colour, luster (metallic, dull, clear, opaque, translucent, …)
-texture
-phase [solid(s),liquid(l),gas(g),aqueous(aq)..dissolved in water] at room temp 20°C
-density
-crystal structure
- solubility in a set amount of water or in other solvents
- reactions with other chemicals
- pH (acidity, basicity)
- boiling point (BP)
- melting point (MP)
- smell
- taste
- metallic (conducts electricity, shiny, ductile, malleable)
- magnetic
- U.V., I..R. absorption
Measurement
1. Equipment Naming (See Handout 1.1)
2. Units ( Standards International S.I.)
See metric conversion line.
Prefixes below represent the power of ten in front of the base unit.
Base
Unit
G | | M | | k h da 1 d c m | | u | | n
g
L
m
Each jump represents a power of ten conversion.
To the right (going from larger unit to smaller) means multiplying by a power of ten and moving the decimal point the corresponding number of places to the right.
eg. 2.5 kL = _____ L Think k to 1 is three jumps or three powers of ten so move the decimal three times to the right. Answer 2500 L.
Each jump represents a power of ten conversion.
To the left(going from smaller unit to larger) means dividing by a power of ten and moving the decimal point the corresponding number of places to the left.
eg, 300. um = _____ cm Think u to c is four jumps to the left so decimal moves four places to the left. Answer 0.03 cm
Homework: Heath pp16,17 Q.1-5