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

Metric System Conversion Exercises:

1.  a.   0.423 m

            b.   0.235 m

            c.   21, 000. m

            d.    0.0214 m

            e.    0.007340000 m ?

When combining quantities with different units,

You must always convert them all to the same unit.

Q.2   Answer in mg, ug, kg,

Q.3   Answer in both units

2. 18.931 mg  =  18,931 ug = 0.000018931 kg

3. a.                      1594 mL   =   1.594 L

b.              216.3 uL   =  0.2163 mL

                  c.     11,300 nL  =  11.3 uL

                  d.     8.3L   =  83 dL

                  e.     27,164 nL   =  0.027164 mL

Homework: Heath pp16,17  Q.1-4

                                                                        pp 19   Q. 1,4