Chemistry Name____________________________________________Period____Date_____
Title Properties of Matter and Changes in Matter
Purpose
1. To observe properties of matter and classify the observations as intensive or extensive.
2. To differentiate between chemical and physical changes.
Procedure
1. Measure .50g of sodium bicarbonate and put it in a 100mL beaker.
2. Record as many qualitative and quantitative observations as you can.
3. Add 10.0 mL of water to the sodium bicarbonate. Stir the liquid until the sodium
bicarbonate dissolves. Record your observations.
4. Add one drop of universal indicator. Record your observations
5. Use a graduated cylinder to measure 5.0mL of dilute acetic acid.
6. Record as many qualitative and quantitative properties as possible.
7. Add one drop of universal indicator to the acetic acid. Record your observations.
8. Add the acetic acid to the beaker of sodium bicarbonate. Record your observations.
9. Answer the analysis questions.
Data - Observations
SUBSTANCE
1. Sodium Bicarbonate
2. Sodium bicarbonate
and water
3. Sodium bicarbonate solution
and universal indicator
4. Acetic acid
5. Acetic acid Solution
and universal indicator
Sodium bicarbonate solution
added to acetic acid solution
OBSERVATIONS
Analysis Questions
1. Is a sodium bicarbonate solution an acid or a base? How do you know?
2. Vinegar is a solution of acetic acid and water. If the term “vinegar” had been used instead of
“acetic acid”, how would you have known that vinegar is an acid?
3. Is sodium bicarbonate (NaHCO3) an element a compound, or a mixture?
4. Is pure acetic acid (HC2H3O2) an element , a compound, or a mixture?
5. Is sodium bicarbonate dissolved in water a heterogeneous or a homogeneous mixture?
6. Is acetic acid solution (vinegar) a heterogeneous or a homogeneous mixture?
7. Is the addition of acetic acid to sodium bicarbonate a chemical or a physical change?
Support your answer.
8. NaHCO3(aq) + HC2H3O2(aq) ----- > NaC2H3O2(aq) + H2O(l) + CO2(g)
(sodium bicarbonate) (acetic acid)
(sodium acetate) (water) (carbon dioxide)
a) What are the reactants in this chemical equation? ________________________________
b) What are the products in this chemical equation?________________________________
c)
What do the following represent? (aq)_______________________________________
(l)___________________________________ (g)____________________________