3. a) 1.8 x 10-2 moles x 6.02x1023molecule x 1 atom = 1.1 x 1022 atoms of iron used…
Brass is an alloy of copper and zinc. This alloy has many uses ranging from coinage to non-ferrous fittings on ships. Many domestic taps use brass where contact with water occurs. You are provided with a sample of brass which is about 150 years old and you are asked to quantitatively analyse it, using colorimetry, to find the percentage of copper present. Your results will be used to compare the composition of antique brass with modern brass.…
In this lab, we changed copper into various forms using different chemicals and chemical reactions. The purpose of this lab is to demonstrate that the product of a chemical reaction depends on what is present at the time of that reaction. This lab also displays how matter cannot be created nor destroyed in a chemical reaction.…
The periodic table is composed of eighteen columns and seven horizontal rows, with two additional rows underneath. There is grand total of 112 elements in the periodic table, each of which is placed in a designated spot on the table and cannot be moved. Different areas on the table have elements that are made of different components. Elements that are in the same column are more similar than elements in the same horizontal row. Seventy five percent of the table is made up of metals, and a couple of the columns on the right of the table have gases. There are only two elements that are liquids- mercury and bromine. Column 1 contains the alkali metals, which suddenly combust when exposed to air or water. Columns 3-12 are the transition metals, which contain heavier atoms, which are more flexible in how they organize their electrons. Column 17 is made up of the more reactive gases- the halogens. The noble gases are in column 18. The electrons are the most significant part of an atom. When atoms don’t have the sufficient number of electrons they need in their outer level, they will do whatever they can to get the number they need. The number of protons an atom has is its atomic number. The atomic number plus the number of neutrons the atom has is the atom’s atomic weight.…
The book COPPER SUN by Sharon M. Draper. Is an interesting story of a girl, named Amari, who lived in a nice village, with her family and friends until, she was kidnapped and sold into slavery. She has many emotions in this book. But I chose a few that I thought were the most important. Which are, frightened and happiness.…
The Effect of pH Level of a Liquid on the Rate of Corrosion of Copper wire…
What happens to the mass of the copper carbonate when it is heated? Give a conclusion, which describes why the mass of copper carbonate may have changed during your experiment.…
TMS, A. (2013). Bir Umm Fawakhir: Insights into Ancient Egyptian Mining. Retrieved March 18, 2013, from The Minerals, Metals and Materials Society (TMS): http://www.tms.org/pubs/journals/JOM/9703/Meyer-9703.html#ToC4…
Copper is a very good conductor of electricity, so it is used for electricity cables. It is easily bent into shape and it does not react with water, so it is used for water pipes.…
Zinc is a lustrous bluish-white metal. It is brittle and crystalline at ordinary temperatures but it becomes ductile and malleable when heated between 110°C and 150°C. It is a reactive metal that can combine with oxygen and other non-metals and will react with dilute acids to release hydrogen.…
The post-lab questions listed at the end of the experiment are to be addressed and discussed in the discussion or error section. They are NOT to be answered, as is normally done, as a list of questions. Even if all of the answers are correct, do not give a score higher than satisfactory for that section if this is how they answered the questions.…
In the experiment, synthesis of copper compounds, the purpose was to recover the original amount of copper after series of chemical reactions. Then returning the copper back to its original form. The copper wire originally weighted 1.0099 g, but after the copper was transformed into Cu(OH)2 to CuO to CuSO4 and finally into Cu, the mass of the recovered copper was 1.1023g; the percent yield was 109%. Since the percent yield is more than 100%, an error must have occurred somewhere in the lab. A possible error could have occurred due to removing the evaporating dish from the Bunsen burner quickly not allowing all the water to be evaporated. Therefore, there was water present in the final mass and it could have caused the percent yield to be greater…
Copper is find in ores, an ore is a type of rock that contains minerals with important elements including metals, there is a lot of different copper ores such as Chalcopyrite, Covellite, Malachite, Azurite:…
The discovery of copper does not have an exact date. Copper is said to be a prehistoric element. This element was said to be first discovered around 8000BC. The ancient civilizations started to take the copper out of the ore they found around 4000BC. This is when copper started to be put to good use. Early civilizations discovered that copper is malleable and is sharp. They realized they could make copper into tools and weapons. This was easier than the stone that they were originally using. This helped a lot because stones were harder to carve, but copper is easy to bend and shape. But what exactly is the element copper? Copper found in the periodic table in Group eleven. Copper is located right before the element gold and the element sliver.…
5) For each of the reactions list the physical evidence that a chemical change was taking place (Please refer to the order in #3)…