Lab Report on Solubility
Separation of the Components of a Mixture
General Chemistry 1 (Chem 101), ISP SCUHS
Report 2
January 26, 2014
Abstract
The analyses of mixture were to distinguish and identify homogeneous mixture by using the techniques of decantation and sublimation. By performing these techniques, we examined our solutions such as SiO2 (sand), NH4Cl (ammonium chloride), and NaCl (sodium chloride) and mixed H2O (water) with each solution after being heated. After examining our solutions, we made calculations by finding the percent mass of each solution once the experiment was completed. In our findings, we were able to determine the mass of the determined and the percent recovery of matter. The outcome of the experiment was that we made the correct calculations which gave us the confidence to know how to do an analysis of mixture.
Introduction
A mixture is a material that is not uniform in composition, and it is a combination of two or more substances in which each substance retains its own chemical identity. Mixtures are characterized by how each of the substances in the mixture retains its chemical integrity, and that mixtures are separable into these components by physical means.1 The substances we see in life are mixtures or compounds. Compounds differ in that the elements come together in definite proportions, whereas mixtures, as previously stated, are not uniform.2 There are 2 types of mixtures, heterogenous and homogenous. A heterogenous mixture is one “in which the composition varies from one region of the mixture to another.”2(p7) This differs from homogenous, where the composition is the same.
In this experiment, the components of the mixture were separated by physical means, and consequently, the components underwent physical changes. A physical change is a change, such as a phase change, that occurs with no change in chemical composition.1 The main concept being applied and studied in this lab was the separation of components of mixtures by physical means,
General Chemistry 1 (Chem 101), ISP SCUHS
Report 2
January 26, 2014
Abstract
The analyses of mixture were to distinguish and identify homogeneous mixture by using the techniques of decantation and sublimation. By performing these techniques, we examined our solutions such as SiO2 (sand), NH4Cl (ammonium chloride), and NaCl (sodium chloride) and mixed H2O (water) with each solution after being heated. After examining our solutions, we made calculations by finding the percent mass of each solution once the experiment was completed. In our findings, we were able to determine the mass of the determined and the percent recovery of matter. The outcome of the experiment was that we made the correct calculations which gave us the confidence to know how to do an analysis of mixture.
Introduction
A mixture is a material that is not uniform in composition, and it is a combination of two or more substances in which each substance retains its own chemical identity. Mixtures are characterized by how each of the substances in the mixture retains its chemical integrity, and that mixtures are separable into these components by physical means.1 The substances we see in life are mixtures or compounds. Compounds differ in that the elements come together in definite proportions, whereas mixtures, as previously stated, are not uniform.2 There are 2 types of mixtures, heterogenous and homogenous. A heterogenous mixture is one “in which the composition varies from one region of the mixture to another.”2(p7) This differs from homogenous, where the composition is the same.
In this experiment, the components of the mixture were separated by physical means, and consequently, the components underwent physical changes. A physical change is a change, such as a phase change, that occurs with no change in chemical composition.1 The main concept being applied and studied in this lab was the separation of components of mixtures by physical means,
References: 1. Zumdahl, Steven S., and Susan L. Zumdahl. Chemistry. 8th ed. Belmont, CA: Brooks/Cole, Cengage Learning, 2010. Print. 2. Tro, Nivaldo J. Matter, Measurement, and Problem Solving. In: Chemistry: A Molecular Approach. Upper Saddle River, NJ: Pearson/Prentice Hall, 2014: 7-8. 3. McMurry, John C., Robert C. Fay, and Stephanie Dillon. Experiment 3: Separation of the components of a mixture. Chemistry: Laboratory Manual. 6th ed. Boston: Prentice Hall, 2012. 33-42. 4. Halbreic, A., Roger, J., Pens, J., et al. Biomedical applications of maghemite ferrofluid. Biochemie. 1998; 80: 379-390. 5. Dimbat, Martin, Porter, P., and Stross, F. “Gas Chromatography.” Analytical Chemistry. 1956; 28(3): 290-297. 6. "Senior Science." HSC Online. http://www.hsc.csu.edu.au/senior_science/core/life_chem/9-2 1/9.2.1.html . Accessed January 22, 2014.