Chemistry Honors Lab 2-3.pdf - Date:​ 8/29/2018 & 8/31/2018...

Date: 8/29/2018 & 8/31/2018
Lab Partners: C431, C441, C425, C430
Team Member Course ID Rating
Purpose:
● Much of science deals with constructing explanations of how things change and how they remain
stable.
● In this lab students are challenged to make careful observations of different phenomena to
discover the chemical and physical changes involved.
Results:
Qualitative Observations for Step 2:
Item Observation
Candle -candle is on fire
-wax is melting
-flame is orange
-after a minute:
-candle has decreased its size

Qualitative Observations for Step 3:
Item Observation
Paper -Paper does not burn at first
-Fire has trouble staying lit
-White splotches and burnt splotches
Qualitative Observations for Step 4:
Test Tube -Before adding NaCl: water is clear
-After adding NaCl: water is still clear and NaCl
is on the bottom of the tube
-After adding AgNo3: The solution has become
cloudy and opaque.
Qualitative Observations for Step 5:
Mg Ribbon and Hydrochloric acid Bubbling, releasing gas, exothermic reaction
Qualitative Observations for Step 6:
CuSO4 Crystals Turning white and green
Chalky
Qualitative Observations for Step 7:
Sulfur (S)