experiment 1. common laboratory operations

1

iron (III) chloride

2

sodium hydroxide

3

test tube holder

4

test tube rack

5

bunsen burner

6

wire gauze

7

funnel

8

Erlenmeyer flask

9

graduated cylinder

10

test tube

1

• precipitation

• iron (III) hydroxide

2

• supernatant liquid

• sodium chloride

what process is shown in the picture?

filtration; most effective & complete way of separating a solid from a liquid

solid resulting from evaporation _________?

• residue

• sodium chloride

what is the black substance called?

black soot

1

outer and hottest part of the flame

2

inner and coolest part of the flame

1

barrel

2

collar

3

air holes

4

gas inlet

5

base

6

gas valve or gas spud(?)

7

gas tube

FeCl₃ + ³NaOH = Fe(OH)₃ + 3NaCl

Precipitation Formula

FeCl₃

Ferric Chloride or Ferric (III) Chloride

³NaOH

Sodium Hydroxide

Fe(OH)₃

• Ferric Hydroxide

• Iron (III) Hydroxide

• “precipitate”

• reddish-brown

³NaOH

• Sodium Chloride

• “Filtrate”

Evaporation

process used to separate sodium chloride and water