Formulation, Testing of Hypothesis, and Experimental Design

1270 WordsAug 12, 20136 Pages
Name: Joie Vincent R. Dagohoy Date performed: 07-01-13 Student Number: 2009-33281 Date submitted: 07-08-13 Exercise 2 Formulation, Testing of Hypothesis, and Experimental Design I. Objectives: a. to define diffusion and demonstrate this process in gases b. to cite molecular weight and time as two factors affecting the rate of diffusion c. to formulate a hypothesis on the relationship of each of these factors on the rate of diffusion d. to conduct and experiment to determine the effects of the two factors on the rate of diffusion e. to compute the partial rate and average rate of diffusion f. to conclude on the relationships of molecular weight and time on the rate of diffusion II.…show more content…
As shown in Table 2.2 and Figure 2.1, the substance that diffused most in the agar through time was KMnO4, followed by K2 Cr2O7, then lastly, the substance that has no visible diffusion, methylene blue, having the chemical formula C16H13N3SCl. Just as in the first part of the experiment, molecular weight is one of the factors that affected the rate of the diffusion of the substances. KMnO4 is the lightest, having a molecular weight of 163.04 g/mol, followed by Cr2O7 having a molecular weight of 294.2 g/mol, and lastly, the heaviest, C16H13N3SCl or methylene blue, having a molecular weight of 319.85 g/mol. There are two factors of diffusion noticeable in this experiment: the molecular weight of the substance, and the time for the diffusion to occur, where the longer the time for the diffusion is allowed to occur, the greater the diffusion will be until equilibrium is reached. However, there could be other factors that can affect diffusion. One factor could be the difference of the concentrations of the two substances. Another factor could be the distance for the diffusion to occur. Another factor could be the temperature when the diffusion happened. Temperature is known to affect most chemical reactions. At higher temperatures, molecules tend to move faster. Therefore, when molecules move faster, the rate of diffusion of substances could be faster too. In the second part of the experiment, the factor that affects diffusion that is experimented is the time
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