Seperation of a Mixture Lab Report Essay Example for Free

Seperation of a Mixture Lab Report Essay 1.Mixture is taken, and has to be measured in order to meet the requirements of 2-3g. 2.The mass of the tray is measured and then the scale is zeroed out and the mixture is added to find out the mass of the original mixture. 3.Next, find the mass of the 250mL beaker, zero out the scale, pour the mixture in, and weigh to find the mass. Find the mass of the 100mL beaker as well. 4.In order to separate the iron from the mixture, take a bar magnet inside of a Ziploc bag, and swirl it through the mixture. 5.The iron will stick to the magnet, and lift the magnet out of the mixture. All iron in the mixture should be on the magnet. 6.The iron taken out of the mixture is then measured to find the mass of the retrieved iron. 7.Next, the salt will be separated from the mixture. In order to do this, a ring stand must be set up with an iron ring and a glass funnel. Take a piece of filter paper and fold it as demonstrated by Mrs. Montoney, and place it in the funnel. 8.Place a 250mL beaker under the funnel for the filtered water. 9.Put the remaining mixture in the funnel. 10.Pour some water in a beaker, record the amount of water and pour it in the funnel. The mixture will begin to filter and drain the salt, leaving behind the sand. More water may need to be added depending on if the salt particles are fully desolved or not. 11.The sand has been recovered. Take the filter paper, unfold it, weigh its mass, and place it in the chemical oven to dry before measuring. 12.While the sand is in the chemical oven, take a hot plate, and place the beaker with the filtered salt water on the hot plate. The water will begin to boil, and eventually, the salt will be  clearly visible and separated. 13.Once the salt is fully dried out, and no water remains in the beaker, remove the beaker with tongs for it will be extremely hot. Measure the beaker with the salt in it and subtract the original mass of the 250mL beaker to find the mass of the recovered salt. 14.The sand should be dry by now. Take the sand on the filter paper out of the chemical oven with extreme caution, place it on the scale, measure its mass, and then subtract the original mass of the filter paper in order to find the mass of the recovered sand. 15.The mixture is now separated into the three substances of sand, salt, and iron. Scientific Background: In order to complete this lab report, the following concepts must be understood. First, the difference between a mixture and a pure substance. A mixture is two or more pure substances combined, that keep their separate chemical identities and properties. The amounts of each pure substance in a mixture can change therefore the physical properties of a mixture depend on its composition, and the composition of a pure substance is constant giving pure substances characteristic physical properties that do not change. Physical properties that are used to describe pure substances include solubility, magnetism, and boiling point, which are all characteristics used in this lab. The next concept is physical changes. Physical changes separate the components of a mixture, such as separating the iron, sand, and salt in this lab. Physical changes that can be used to separate mixtures include filtration, evaporation, and distillation. Mass percent composition is a way to express the real composition of a mixture by the amount of each component. In order to do this, the substances must be separated quantitatively. Lastly, percent yield which describes the efficiency of the â€Å"recovery operation† is calculated to separate the mixture. (Handout) Observations: The observations for this lab are as follows: †¢The original mixture is a brownish color, and the difference between the different substances can easily be determined by sight. †¢When the water was poured into the mixture of sand and salt during the filteration process, the filtered water was coming through slowly in large drops. †¢During the  filtration process, the salt seemed to not be dissolving as quickly as thought, and more water was needed. †¢When the salt water was being boiled, all of the sudden the water turned into what looked like foam and the salt started popping. †¢When the sand was taken out of the chemical oven, salt particles that had not been dissolved were found on the bottom of the filter paper. †¢The iron had a high magnetism, while sand and salt had none at all. †¢The salt had a high solubility in water while the sand did not. †¢The physical appearance of the iron resembled rough tiny little black hairs.

International business Essay -- essays research papers fc

Protectionism in the global economy The global economy has seen a dramatic increase in services trade between countries. The regulation and monitoring of service trade between countries has become much harder. As highlighted by Johnson, trading in services was the fastest growing constituent of global trade during the 80’s and 90’s. Cross border transactions include anything from banking to software. When services are offered to another country, the provider has to interact with the customer through either, cross border communications, movement of the provider or the consumer moving to the supplier’s state of residence. Technology has made international trade much easier and more feasible; this has lead countries to boost services being exported to other countries. IT has decreased the cost of communication between countries. As a result it has made it more feasible for businesses to introduce new products and modify services abroad. This spark in global trade of services has its downfalls. The lib eralization of services goes against certain countries’ development strategies. Areas like health and education needs the provisional planning of governments. The interference from abroad has hindered the governments’ strategic planning with respect to these services. This takes us to the importance of regulating services coming in from abroad through protectionism. Regulations on services can be a burden on service providers which can consequently weaken the liberalization of tr...

The migration of people to cities

The migration of people to cities is one the biggest problems facing the world's cities today. Discuss the main causes. What solutions could be used to tackle the situation? Nowadays, the issue of urbanization is more frequently discussed than ever before due to its increasing impacts on lives and on the environment. Most people will not argue the fact that living in a city is easier overall than living in the country. Despite that fact, many generations have lived in rural settings by choice over the decades. The pursuit ofa better standard of living, education and higher health care are the main causes of migration to urban areas.Many people hope that if they move to live in a big city they will find higher-paying Jobs. However, mass migration to cities causes greater competition for Jobs and this lead to underemployment. Others want their children to get better education and often high-ranked schools or universities with well-trained teachers are in the city. Moreover, the expansi on of cities often leads to environmental problems, such as pollution. To solve the migration problems there are a number of solutions. One of the possible answers is to improve the quality of life in the countryside. Government could invest in building medical facilities and schools.Media can also be used to promote a healthy and stress free life in the countryside. Another way to attract people to stay in rural areas is creating more employment opportunities. By doing this, many people will choose to stay in the countryside. To conclude, because of urbanization the raw beauty of rural life is fading into oblivion. Convincing people to live in the countryside might seem as a difficult task, but if for once we escape the dullness of the city and discover the stunning places, hidden in the forgotten parts of our country we might Just realize what we are missing. 285 words 30 minutes

The History of Toy Inventions

Toy manufacturers and toy inventors use both utility and design patents, along with trademarks and copyrights. In fact, many toys especially video games take advantage of all three types of intellectual property protection. Toys as big business did not begin until after the 1830s, when steamboats and steam trains improved the transportation and distribution of manufactured goods. Early toymakers used wood, tin, or cast iron to fashion horses, soldiers, wagons, and other simple toys. Charles Goodyears method for vulcanizing rubber created another medium for manufacturing balls, dolls, and squeeze toys. Toy Manufacturers One example of a contemporary toy manufacturer is Mattel, an international company. Toy manufacturers produce and distribute most of our toys. They also research and develop new toys and buy or license toy inventions from inventors. Mattel began in 1945 as a garage workshop belonging to Harold Matson and Elliot Handler. Their business name Mattel was a combination of the letters of their last and first names, respectively. Mattels first products were picture frames. However, Elliot started making dollhouse furniture from picture frame scraps. That proved to be such a success that Mattel switched to making nothing but toys. Electronic Toys In the early 1970s, Pong, the first patented video game was a great hit.  Nolan Bushnell  created Pong along with a company named Atari. Pong debuted in  arcades and was soon ported to home units. The games Space Invaders,  Pac-Man, and Tron followed. As technology advanced, the dedicated single game machine was replaced by programmable machines that allowed different games to be played simply by exchanging a cartridge. Inventions in circuitry and miniaturization in the early 1980s produced handheld games. Nintendo, a Japanese electronics company, along with many others, moved into the video game market. Home computers created a market for games that were versatile, action-packed, challenging, and diverse. As our technology progresses, so does the complexity and diversity of our amusements. Once, toys simply reflected everyday life and activities. Today, toys create new ways of living and teach us to adapt to changing  technologies and inspire us to follow our dreams. The History of Specific Toys From Barbie to the yo-yo, learn more about how your favorite toy was invented Barbie DollCrayonsEtch-A-SketchFrisbeeHacky SackHula HoopLEGOMr. Potato HeadPlay-DohPuzzles, Board and Card GamesSilly PuttyTeddy BearsComputer and Video GamesYo-Yo