Project 1 Final Lab Report.docx

We repeated this step for all three substances the ph

Info icon This preview shows pages 3–6. Sign up to view the full content.

View Full Document Right Arrow Icon
then mixed with a stirring rod until it was observed that the substances dissolved. We repeated this step for all three substances. The ph test was conducted after, with pH strips that were placed in the solution. The color changed of the strips were observed and recorded periodically. The final test was the conductivity test using the conductivity meter which was placed into the beaker of the solution and then the measure was recorded on. Part 2: In the second week of experiments precipitate tests were conducted periodically for each unknown substance. They were mixed in there soluble and insoluble counterparts to determine their identity. One by one we tested different compounds with our unknown substances to narrow it down to three. Whenever a precipitate with formed we could confirm that it was insoluble and whenever it did not form it was soluble. We determined this by how the unknown substance dissolves in the solution. Safety:
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A few precautionary measures to take into account for these experiments are to wear lab coats and goggles at all times. It is very important that you wash hands before and after experiment to get rid of impurities and hazardous chemicals that may be left over from the experiment. Handle acids carefully and other hazardous materials under the safety hood and do not inhale or taste the unknown substances given to you. Use proper waste containers to dispose of solutions. Results: Part 1: Sample Flame test Solubility in water pH Conductivity A greenish Soluble 6.1 19.41 C red-orange Soluble 6.4 13.10 D yellow Soluble 7.0 7.00 Figure 1.1 Part 2: Sample Forms Precipitate with A Silver Nitrate C Sodium Carbonate
Image of page 4
D Sodium Carbonate Figure 1.2 Calculations: Sample A: AgNO3 (aq) + NH4Cl (aq)→ AgCl (s) + NH4NO3 (aq) Sample C: Ca(NO3)2 (aq) + Na2CO3 (aq) → CaCO3 (s) + 2NaNO3 (aq) Sample D: Na2 CO3 + 2 CH3COOH → 2 CH3COONa + CO2 + H2O Discussion: Part 1: For our first week of experimentation we conducted three different tests to determine the unknown substances. We did a flame test to see what color is shown we the salt undergoes an energy change (by applied heat). Based off of these colors we could determine what ions make up the compound salts to get closer to its identity. We could then eliminate all the substances from our list that we knew could not possibly produce those colors. The conductivity test was done to determine the substances were good conductors of electricity with the use of a conductivity meter. This could have been an aid in simplifying our list however is was a more complex measure to use for indication of a substance’s conductivity. Calculations were necessary
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern