A small window on a large world Art is the creative process and it goes through all fields. Einstein was more of an artist in physics than on his violin
Through the use of percent composition one can easily find out how much of a certain element is in a compound or an item such as a post penny. The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell.
The portion that will be measured is the mass of copper left after all of the Zn goes through the reaction process. What is the percent composition of Copper and Zinc in a post penny? The purpose is to determine the percent composition of Zinc and Copper metals in a post penny Penny lab report the use of HCl.
Molarity of HCl, and year of penny. Note that HCl is an acid and must be cautious around this acid for it can burn your eyes so wear goggles, and wash hands after the lab.
Retrieve a penny that is postand clean and dry the beaker you are going to use to make sure it has no residue from any previous users.
Note it will be more effective if each filling mark is at o angle of each other. Once the penny has been filed, weigh it and record its mass. Place the penny in the beaker and add the HCl.
Let sit for a day and recover your penny. After the penny seems hollow retrieve the copper shell and mass it.
Wash and rinse a penny in tap water. Dry it completely with a paper towel. Place the penny on a flat surface. The flatter the surface, the better this experiment is going to go. Penny lab report - commit your report to experienced scholars working in the platform #1 affordable and trustworthy academic writing service. Get started with term paper writing and write finest term paper ever. Suzy Freeman-Greene. Section Editor: Arts + Culture. Suzy is a former features editor, news editor and arts editor at The Age, where she wrote a regular oped column for many years.
Once massed use the percent composition formula to find out how much copper is in a penny. Subtract your finding of the percent composition of copper from to find percent composition of zinc. Repeat steps for multiple trials. At the end of the experiment, through the use of percent composition, the copper within the post penny was found to be 35 percent, and 65 percent zinc.
The only solution to the problem is keep filing the. Human error was the largest source of error in the lab. Finding the mass of two objects and using indirect measurements could lead you to the wrong number depending on rounding, thus slightly increasing or decreasing your percent yield in the experiment.
Also if you use the wrong sig figs while solving for the percent composition this could cause problems. If I were to retry lab, I would make sure to file more than what I thought was needed, and to make sure to get a penny of the same year for a second trial.
By adding a catalyst, a change in the speed of the reaction could reduce the time needed.Drops On A Penny Lab Cohesion Water molecules are attracted to other water molecules. The oxygen end of water has a negative charge and the hydrogen end has a positive charge.
The hydrogens of one water molecule are attracted to the oxygen from other water molecules. This attractive force is what gives. Penny Lab. Teacher’s Instructions.
Brief Description of Activity: The lesson uses in depth laboratory procedure to familiarize students with the operations of a laboratory as well as an activity to help students learn about physical properties of elements and the visual manifestations of physical changes.
Students will experience and understand how convex and concave lenses work and the different ways they are used. I get asked a lot about health insurance claims. Having had many different diagnoses, surgeries, and procedures I have became all too familiar with interacting with insurance companies.
Conclusion The lab was able to meet the main objective of this experiment, which was to estimate the unknown composition of the pennies minted in by analyzing and comparing data found and given of pennies minted .
Suzy Freeman-Greene. Section Editor: Arts + Culture. Suzy is a former features editor, news editor and arts editor at The Age, where she wrote a regular oped column for many years.