Station 1: Chemical Changes
1. Get a piece of Alka Seltzer tablet and drop it into water. You are observing a chemical change. Record what your
observations.
2. Take a strip of Magnesium metal and drop it into the hydrochloric acid. You are observing a chemical change.
Record your observations.
At this station you recorded observations for two different chemical changes. Make a general rule for classifying
chemical changes of this type.
Station 2: Chemical Changes
3. Get a piece of Magnesium and light it on fire with the Bunsen burner. You are observing a chemical change.
Record your observations
4. Get a piece of wood splint and light it on fire in the Bunsen burner. You are observing a chemical change. Record
your observations
5. Light the Bunsen burner using proper technique. Use the striker then adjust flame by tightening or loosening the
valve stem. You are observing a chemical change. Record your observations.
At this station you recorded observations for a chemical change. Make a general rule for classifying chemical changes of
this type
Station 3 – Chemical changes
6. In the Baggie there is Sodium Bicarbonate and Calcium chloride. You will need to pour in 10mL of Universal
Indicator, mix the contents. You are observing a chemical change. Record your observations.
7. In the test tube put 5 mL of Silver nitrate and 1mL of Sodium chromate drop-wise. You are observing a chemical
change. Record your observations
At this station you recorded observations for two different chemical changes. Make a general rule for classifying
chemical changes of this type
Station 4 – Physical changes
8. Add 100 mL of water to a clean beaker. Then add 1 scoop of sugar and stir until it dissolves. You are observing a
physical change. Record your observations
9. Add 100mL of water to a clean beaker. Then add 1 scoop of salt and stir until it dissolves. You are observing a
physical change. Record your observations
At this station (station 4) you recorded observations for two physical changes. Make a general rule for classifying
physical changes of this type
Station 5 – Physical changes
10. Heat the glass tubing until it will bend. You are observing a physical change. Record your observations.
11. Break the tubing that you just heated (be careful not to cut yourself!). You are observing a physical change.
Record your observations
At this station you recorded observations for two different physical changes. Make a general rule for classifying physical
changes of this type
Station 6 – Chemical property list
12. Take a look at the chemical properties list below. All items listed are chemical properties.
a. Gasoline is flammable
b. Pure Sodium will react violently with water
c. When mixed together in solution, Calcium chloride and Sodium bicarbonate will react
d. Iron will oxidize (rust) when left outside in the weather
e. Gunpowder will ignite when exposed to an open flame
At this station you were given several examples of chemical properties. Make a general rule for classifying chemical
properties.
Station 7 – Physical property list
13. Take a look at the physical properties list below. All items listed are physical properties.
a. The volume of the balloon is 35 mL
b. The density of the wood is 0.75 g/mL
c. The melting pint of sulfur is 112’C
d. Sulfur is yellow
e. Copper is a malleable metal
f. Copper is also a ductile metal
At this station you were given several examples of physical properties. Make a general rule for classifying physical
properties.
Station 8 – Intensive property examples
14. You are given two pieces of red cloth that are different sizes. The color represents an intensive property. Record
your observations.
15. You are given two different pieces of wood that are different sizes. The density of each is the same. Density is an
intensive property. Record your observations
16. You are given two different amounts of water. The boiling point of water is 100’C. Each of the samples will boil
when they reach 100’C. Boiling point is an intensive property. Record your observations
At this station you were given several examples of intensive properties. Make a general rule for classifying intensive
properties.
Station 9 – Extensive property examples
17. You are given two different amounts of water. While they will both boil at 100’c it will take the larger sample
longer to boil. Amount of heat that a substance can absorb is an extensive property. Record your observations.
18. You are given two different amounts of metal. The larger sample will weigh more than the smaller sample. Mass
is an extensive property. Record your observations.
19. You are given two different balloons that each have different amounts of air in them. The larger balloon has
more volume than the smaller balloon. Volume is an extensive property. Record your observations
At this station you were given several examples of extensive properties. Make a general rule for classifying extensive
properties.
Station 10 – Mixtures
20. The sand and water mixture represent a heterogeneous mixture. Record your observations
21. The coffee and water mixture represent a heterogeneous mixture. Record your observations.
22. The salt water mixture represents a homogeneous mixture. Record your observations
23. The ammonium nitrate solution represents a homogeneous solution. Record your observations
At this station you were given several examples of mixtures. Make a general rule for classifying mixtures as well as a
general rule for classifying mixtures as homogeneous and heterogeneous
Station 11 – Pure substances
24. The sealed vial is pure sulfur. It represents a pure substance and the only element present in the vial is sulfur. If
you heat it the sample will melt. Record your observations
25. The other sealed vial contains iodine. It represents a pure substance and the only element present is Iodine. So it
also represents an element. The gas you may see is Iodine that has sublimed. Record your observations
26. The beaker contains sugar. It represents a pure substance. It is 2 carbon atoms, 4 Hydrogen atoms and 2 Oxygen
atoms bonded together. So it also represents a compound. If you heat it the sample will undergo a chemical
change as the sugar decomposes (called thermal decomposition). Record your observations.
27. The second beaker contains Sodium bicarbonate. It represents a pure substance. It is 1 Sodium atom, 1 carbon
atom, 1 Hydrogen atom and 3 Oxygen atoms bonded together. So it also represents a compound. If you heat it
the sample will undergo a chemical change as the sodium bicarbonate decomposes (called thermal
decomposition). Record your observations.
At this station you were given several examples of pure substances. Make a general rule for classifying pure substances
as well as a general rule for classifying elements and compounds.
Station 12 – Filtration and distillation set-up
28. Take a look at the filtration set-up. It is used to separate heterogeneous mixtures based on particle size. Record
your observations
29. Take a look at the distillation set-up. It is used to separate homogeneous solutions based on different boiling
points. Record your observations
At this station you were given two different mixture separation technique lab set-ups. Make a general rule for when you
would be able to use each.