2. In a demistry dass, students are performing a lab to observe the effect of heating on copper sulfate pentahydrate (CuSO -5H20) and to identify the type of change from their data, Below is the data table from the
lab notebook from the students.
Effects of Heating on Copper Sulfate Pentahydrate
Steps
3
Observation
1. Note the appearance of copper sulfate in the given closed test tube
Dark blue crystals
2. Heat for 5 minutes and note the appearance of the solid after heating
Grey white crystals
3. Observe the top of test tube
Water droplets appeared
4. Shake the test tube to mix the grey white crystals with water droplets Grey white crystals turned
Formed during the heating process
back to dark blue
Based on the given information, which of the following is the students' correct conclusion about their experiment?
Heating of CuSO« 5H20 is a chemical change because of the color change from dark blue to grey white in step 2.
Heating of CuSO 5H20 is a chemical change because of the appearance of water droplets in step 3.
Virtual Class 81.29
Heating of CuSO 5H2O is a physical change because of the color change from dark blue to grey white in step 2.
Heating of CuSO 5H20 is a physical change because the grey white crystals turned back to dark blue in step 4.
Help pls