1. Existing knowledge, research and views:
The separation of the sulfur and iron powder was accomplished through magnetism. When combining the sulfur and iron powder to form a mixture, a magnet can be used to attract the iron separating it from the sulfur. Unlike the iron and powder, the salt and sand were separated through filtration. This is a method which separates solids from liquids. In the experiment, the mixture of salt, sand and water are separated as it is poured through a funnel with filter paper. The water along with the salt pass through the funnel while the sand stays behind on the filter paper.
2. Manipulation:
After the separation of sand and salt was completed, the percent composition of the mixture could be found. To find the percent composition, the mass of each component is divided by the total mass of both components. After the separation, the sand and salt were weighed to get their individual masses. The sands mass was 6.35 g while the salts mass was 3.40 g, both masses were calculated having three significant figures. When adding both components together, the total mass was 9.75 g. The sands percent composition was found by dividing its mass of 6.35g by the total mass of 9.75 g, which was calculated to be 65.1%. The salts mass was found by …show more content…
After the experiment, my group calculated the sum of the % NaCl and % sand to be 9.75 g. The percent error was calculated to be 2.5 %. To find the percent error, the absolute value of the difference between the theoretical value and experimental value divided by the theoretical value then multiplied by 100. The theoretical value or the expected value refers the known value, while the experimental value or determined value is the value that is calculated and found in the experiment. So, the theoretical value, 10 g, was subtracted by the experimental value, 9.75 g, and divided by the theoretical value, 10 g, then multiplied by 100 to get a percent error of 2.5
The separation of the sulfur and iron powder was accomplished through magnetism. When combining the sulfur and iron powder to form a mixture, a magnet can be used to attract the iron separating it from the sulfur. Unlike the iron and powder, the salt and sand were separated through filtration. This is a method which separates solids from liquids. In the experiment, the mixture of salt, sand and water are separated as it is poured through a funnel with filter paper. The water along with the salt pass through the funnel while the sand stays behind on the filter paper.
2. Manipulation:
After the separation of sand and salt was completed, the percent composition of the mixture could be found. To find the percent composition, the mass of each component is divided by the total mass of both components. After the separation, the sand and salt were weighed to get their individual masses. The sands mass was 6.35 g while the salts mass was 3.40 g, both masses were calculated having three significant figures. When adding both components together, the total mass was 9.75 g. The sands percent composition was found by dividing its mass of 6.35g by the total mass of 9.75 g, which was calculated to be 65.1%. The salts mass was found by …show more content…
After the experiment, my group calculated the sum of the % NaCl and % sand to be 9.75 g. The percent error was calculated to be 2.5 %. To find the percent error, the absolute value of the difference between the theoretical value and experimental value divided by the theoretical value then multiplied by 100. The theoretical value or the expected value refers the known value, while the experimental value or determined value is the value that is calculated and found in the experiment. So, the theoretical value, 10 g, was subtracted by the experimental value, 9.75 g, and divided by the theoretical value, 10 g, then multiplied by 100 to get a percent error of 2.5