Chemical Changes Lab
Santiago Canales Partner: Cody Patterson
MR. G
Physical and Chemical Changes lab
Pre lab discussion
1.
a- chemical change b- chemical change c- physical change d- chemical change e- physical change
2. Change in color, gas, light or smoke and heat.
3.Becuase if the temperature changes you can notice it better this way.
4. I will use goggles and cloves all the time, I also need to point dangerous materials away from other people and I should be specially cautious with hydrochloric acid.
Chemistry
Problem- How can you recognize and differentiate between physical and chemical changes?
X= A change that occurred (add tearing paper)
1.Melting candle wax
2.Burning candle wick
3.Burning paper
4.KI+Pb(NO3)2 …show more content…
After we mixed two chemicals and felt the outside of the tube, the temperature was warm meaning it was a chemical change since heat was created. For example, in step 5, we mixed HCL and Mg and touched the test tube and it was warm.
3. Indicate whether following changes are chemical or physical
A. Physical change, no new substance is created and the texture does change
B. Chemical change, the burning candle released smoke showing how a new chemical was made.
C. Physical change, tearing paper is a physical change because their is nothing that shows a chemical change occurred but the tearing and change of texture shows a physical change.
D. Chemical change, burning paper released smoke and the paper changed color as it burned.
E. Physical change, if the water is removed by evaporation you still have NaCl making no new substance.
F. Chemical Change, when you mix this two you create precipitation, so this shows its chemical.
Chemical change, adding these two substances produced a gas making it a chemical change.
H. Physical Change, no chemical change only changes that are physical occurred you grinded the substances.
I. Chemical change, this created anhydrous copper
MR. G
Physical and Chemical Changes lab
Pre lab discussion
1.
a- chemical change b- chemical change c- physical change d- chemical change e- physical change
2. Change in color, gas, light or smoke and heat.
3.Becuase if the temperature changes you can notice it better this way.
4. I will use goggles and cloves all the time, I also need to point dangerous materials away from other people and I should be specially cautious with hydrochloric acid.
Chemistry
Problem- How can you recognize and differentiate between physical and chemical changes?
X= A change that occurred (add tearing paper)
1.Melting candle wax
2.Burning candle wick
3.Burning paper
4.KI+Pb(NO3)2 …show more content…
After we mixed two chemicals and felt the outside of the tube, the temperature was warm meaning it was a chemical change since heat was created. For example, in step 5, we mixed HCL and Mg and touched the test tube and it was warm.
3. Indicate whether following changes are chemical or physical
A. Physical change, no new substance is created and the texture does change
B. Chemical change, the burning candle released smoke showing how a new chemical was made.
C. Physical change, tearing paper is a physical change because their is nothing that shows a chemical change occurred but the tearing and change of texture shows a physical change.
D. Chemical change, burning paper released smoke and the paper changed color as it burned.
E. Physical change, if the water is removed by evaporation you still have NaCl making no new substance.
F. Chemical Change, when you mix this two you create precipitation, so this shows its chemical.
Chemical change, adding these two substances produced a gas making it a chemical change.
H. Physical Change, no chemical change only changes that are physical occurred you grinded the substances.
I. Chemical change, this created anhydrous copper