1,366
14
Essay, 2 pages (300 words)

Physical and chemical changes essay

Contents

  • Question #4 answer.

I did this lab to find out the differences between chemical and physical changes. I also did this lab to learn the signs that would indicate the chemical reactions and physical changes. I needed to learn the odor change, color change, bubbles or gas, irreversible, temperature changes and finger prints. By the end of the lab, my goal was to be able to didtinguish easily the difference between chemical and physical changes.

Question #1 answer.

  • 1. Gas.
  • 2. Dissolved in water.
  • 3. Liquid
  • 4. Insoluble solid or precipate.

Question #2 answer.

When adding HCl into sodium bicarbonate it is forming a new substance but when dry ice sublimes its only rearranging molecules.

Question #3 answer.

  • 1. My finger prints
  • 2. HCL in to NaOH.
  • 3. Mixing rubbing alcohol with water.

Question #4 answer.

  • 1. Solid yellow lead iodide and potassium nitrate.
  • 2. Burning magnesium.
  • 3. Forming crystals.

This lab helped us to learn the difference between chemical and physical changes. In a physical change, the original substances still exist and nothing new has been formed. In a chemical change, new products are formed and it is usually irreversible. Signs that a chemical change has occurred are a change in temperature, a change in odor, a solid is precipitated, it is irreversible or hard to reverse, a change in color, and the production of bubbles, indicating the release of a gas.

This lab has introduced us to physical and chemical changes as well as indicators to them. This lab helped me to learn the difference between chemical and physical changes. In a physical change, the original substances still exists and nothing new has been formed. But in a chemical change, new products are formed and it’s usually irreversible. I have noticed temperature and color changes. The production of bubbles, indicates the release of a gas.

Thank's for Your Vote!
Physical and chemical changes essay. Page 1
Physical and chemical changes essay. Page 2
Physical and chemical changes essay. Page 3

This work, titled "Physical and chemical changes essay" was written and willingly shared by a fellow student. This sample can be utilized as a research and reference resource to aid in the writing of your own work. Any use of the work that does not include an appropriate citation is banned.

If you are the owner of this work and don’t want it to be published on AssignBuster, request its removal.

Request Removal
Cite this Essay

References

AssignBuster. (2022) 'Physical and chemical changes essay'. 30 September.

Reference

AssignBuster. (2022, September 30). Physical and chemical changes essay. Retrieved from https://assignbuster.com/physical-and-chemical-changes-essay/

References

AssignBuster. 2022. "Physical and chemical changes essay." September 30, 2022. https://assignbuster.com/physical-and-chemical-changes-essay/.

1. AssignBuster. "Physical and chemical changes essay." September 30, 2022. https://assignbuster.com/physical-and-chemical-changes-essay/.


Bibliography


AssignBuster. "Physical and chemical changes essay." September 30, 2022. https://assignbuster.com/physical-and-chemical-changes-essay/.

Work Cited

"Physical and chemical changes essay." AssignBuster, 30 Sept. 2022, assignbuster.com/physical-and-chemical-changes-essay/.

Get in Touch

Please, let us know if you have any ideas on improving Physical and chemical changes essay, or our service. We will be happy to hear what you think: [email protected]