Chemistry

Ase Ruth Alozie
Chemistry Take home test May 4, 2013

In a laboratory experiment, a student reacted 2.8 grams of Fe (s) (steel wool) in excess CuSO4 (aq), according to the following balanced equation: Fe(s) + CuSO4 (aq) -> FeSO4 + Cu(S).
When the Fe(s) was completely consumed, the precipitated Cu had a mass of 3.2 grams. Did the student’s result on this experiment verify the mole ratio of Fe(s) to Cu as predicted by the equation?
Answer: yes, because the experiment result was 2:1
Calculate the mole ratio of Fe to Cu and explain

Ase Ruth Alozie
Chemistry take home test May 4 2013 Statement: All experiment carried out by scientist in laboratory yield experimental results that are accurate. Scientist follows directions accurately and repeat experiments multiple times to ensure that all their result are correct. If an experiment is done correctly, the final product (actual yield) will be equivalent to the amount of the product expected to be produced (Theoretical yield) I agree with the statement above for various reasons. Since the beginning of time, people have tried to find out more about the world around them, wondering how and why things work. A scientist is someone who studies science. With an experiment, the scientist is trying to learn something new about the world, or explanation of why something happens. A scientist conducts research and performs experiments for the purpose of making new discoveries about the world and how it works. They may concentrate on a particular field of science, such as Biology, Ecology, or Geology. Scientist use a method called scientific method to conduct an experiment. A scientific method is a method of research in which a problem is identified, relevant data are gathered, a hypothesis is formulated from these data, and the hypothesis is empirically tested. The scientist conduct multiple trials of this experiment to make sure all results are accurate. For example, in order for scientist to come up with the medicine we use when we’re sick they have to make sure that this medicine works. They will have to do multiple trials and test the product to make sure the information gathered is accurate and definite. They might test the drug on an animal to see if it works. All medical research is carefully planned, and this includes medical research with animals. Experts who review a scientist’s proposed experiment involving animals weigh several considerations before approving each study. The most important thing is that the research must be relevant to human or animal health. Studies need to protect the animals’ welfare. That means that only the fewest number of the most appropriate species may be used. If the experiment is done correctly the actual yield also known as the final product will be equivalent to the theoretical yield which is also known as the amount of product expected to be produced. The theoretical yield of a reaction is the amount of some product, usually given in mass units of grams that you would expect to get. The actual yield is the definite amount of product, in grams you actually produced after really running the experiment in the lab. Actual yield data comes from experimentally determined results. You cannot calculate it. In order to become a scientist u must me dedicated. It takes a lot of work to be able to figure out how the things around us work. Scientist must go to school for multiple years in order to be able to perform an accurate experiment. Each study conducted must me reviewed by many different scientists to see if they end up with similar results. It is important to formulate a theoretical yield and then run an experiment to find out the actual yield. Scientist do a lot for the word we live in and they are widely recognized.