FORMATION OF IRON LAB.
A glass pipet containing some iron(III) oxide is heated while a
stream of hydrogen is passed through the pipet. The elemental iron
formed is attracted to a magnet held near the pipet.
REACTION BETWEEN COPPER(II)
OXIDE AND HYDROGEN.
glass pipet containing some copper wool is heated while a stream
of air is passed through the pipet. The elemental copper turns black
due to copper(II) oxide. Next, hydrogen is passed through the pipet
with continued heating. The black copper(II) oxide is converted
to shiny elemental copper metal.
Students are given samples of three gases
that they have previously studied in the laboratory: carbon dioxide,
hydrogen, and oxygen. They design a set of experiments from their
previously experiences in order to identify the three gases.
This group laboratory activity experiment
utilizes everyones data to give an overall group result that
demonstrates the concept of percent composition. A group graph is
produced and used by each pair of students in order to determine
the percent composition of a Tums tablet.
BEVERAGES - PRIESTLEY'S
Students (a) determine the carbon dioxide
in a carbonated beverage and (b) produce their own carbonated water.
The unit includes two classroom demonstrations: (a) carbonated water
and tap water are frozen and compared and (b) the carbonic acid
- carbon dioxide equilibrium us demonstrated.
MASS OF A GAS.
The molar mass of almost any gas can be determined
with excellent accuracy. The experiment can easily be completed
within a single laboratory period.
This group laboratory activity uses everyones
data to demonstrate the concept of limiting reagent. Varying amounts
of magnesium are reacted with standard amounts of dilute hydrochloric
PRESSURE WITHOUT A BAROMETER.
No barometer? No problem! This group laboratory
activity uses everyones data to determine the actual barometric
pressure (not altitude-adjusted like one gets from the US Weather