Essay about Electrostatic Coulomb Constant

on insulated threads. The spheres are .15 m (15 cm) apart. Sphere A has a charge of +5.0 μC and sphere B a

I found out that both of my experiments were off by 0.46 and 0.13 but were remotely

But the result met the expectation because the color of the solution was reached the end point by changing from red to blue. The primary errors may occur because of misreading the buret while measuring the volume of EDTA. Another error can affect the result of the experiment was that letting the volume of EDTA excess the ending point; so that the volume of EDTA was overapply that lead error. The last source of error was that our unknown sample had high percentage in mass of Mg2+, so that we need more than 50 ml of EDTA( which was the capability of the buret) to reach the end point. We had to refill the buret while measuring; and also the large volume of solution made the color harder to recognize the end point. That also led to error.

This lab could have contained errors. The errors could have happened when performing the lab. Some of the possible errors in this lab are:

There are two main errors that could happen in this lab. The first being human error when weighing the elements. This would result in more reactants which would cause more products and a misreading

What is the goal of this lab? What question is it trying to answer, or what problem is it trying to explain?

When combing your hair, you scuff electrons from your hair onto the comb. Is your hair then positively or negatively charged? How about the comb?

What was concluded when doing the lab was to determine which product of the equation was the limiting reactant. When doing all the calculations were 83.1% of the yield of the compound. It is very close to having almost the perfect percentage of the limiting yield when doing the

Based on these results recorded in Figure 1, it appears that Tube 2, which contained the 10% salt concentration, would be one of the optimal concentrations due to its high absorbance similar to Tube 3 and Tube 4 and it having a rate of the reaction was significantly faster than the other tubes. However, taking a deeper look into understanding the information, we can attribute human error to Tube 2. The reason it is believed that Tube 2 contained human error was because the initial recording started with a very high absorbance reading and did not have a large change in absorbance.

The percent uncertainty for beakers was not calculated. The beakers were only used for storing the solutions. Therefore, the accuracy of the beakers did not affect the outcome of the

These different mistakes during the lab caused the results to change during the

Because the value in the theoretical mass of CO_2 lost in the first run was 0.566 g and the mass obtained from the experiment was 0.618 g. This shows that 0.618 g was close to the theoretical value and it had a 9.11% error. On the other hand, the values of sodium carbonate had a greater percent error (22.2% and 39%) which meant that there was a big difference between the theoretical expectation and the actual mass obtained. Some discrepancies that could of cause the values to differ are the grams of NaHCO_3 and Na_2 CO_3 added to the beakers because some values were close to one gram or a little more than a gram. Another discrepancy is that some of the HCl might have stayed in the volumetric pipette; therefore this would of affected the weighted mass of the beaker with the

Confidence Report: I am confident that our data in the experiment was “good data”. We had the expected positive results occur from the identification experiments. We made sure to measure everything correctly. We correctly identified the

This lab is performed in order to determine the total energy in a reaction between zinc and hydrochloric acid. The reaction is done twice, once to measure the heat of the reaction and again to determine the work done in the system. This is because Enthalpy equals heat plus work (∆H= ∆E+W). Heat and work can be broken down further into separate components so the equation used in lab is ∆H=mc∆T + PV. Many calculations are used in the lab to find out what cannot be measured directly (ex: volume). After all the calculations were complete it was shown to have a very small percent error.

1. The samples were very clear in what they were portraying and was very easy to understand. I tried my best to follow the references and to make the experiment running as smooth as it seemed to be in the reference material.