Again we will use ρ=m/V in order to calculate the density of water. Experimental technique The first part of experiment is done in following steps: The second part of experiment is done in following steps: Results The density of water by using hydrometer: 1. 26.5 °C room temperature 2. 37.8 °C and 36.3 °C 30-40 °C 3. 41.7 °C and 40.2 ° C 40-50 °C 4.
Then, the averages for each test were calculated and recorded in Table 2. The results were then transferred to Graph 1, which displays the effect of change in volume on pressure and illustrates the inverse relationship between the variables. Graph 2 demonstrates 1/volume versus pressure, and should have a linear best fit line that goes through the origin. However, due to the line of best fit not going through the origin, it is indicted that there are random and systematic errors. Graph 3 demonstrates pressure times volume versus pressure and should be a horizontal line.
Water desalination is the way to provide clean and fresh water to use it in either drinking or agriculture. It can be done by using various technologies that are able to extract the unwanted minerals from the seawater to make it clean. A. History of water desalination The process of water desalination has a long and rich history. According to A Short History (2015, p.1), in the ancient Greece, Aristotle and a group of intellectuals marked the beginning of the desalination process.
In the lab, “Properties of Hydrates,” the purpose was to compare the properties of several well observable hydrates and to determine if dehydration is a reversible or irreversible change. The lab consisted of attaining a pea-size sample of each compound, burning it over a bunsen burner, and comparing the starting mass and the mass lost after the combustion. These results are important to be able to identify a variety of different chemicals that contain water molecules as part of their crystalline structure. Some can be removed by heating (resulting in evaporation) and some remain mostly unchanged. In this lab the answer will be found.
Vapor Pressure of Water vs. Temperature Use your observations from the pressure vs. temperature lab to answer the following questions: 1. What happened to the height of the water according to your lab investigation? I should see the terms vapor pressure and temperature properly used. 2.
The purpose of this lab is to observe the reaction between hydrochloric acid and magnesium metal. When the substances are reacted over water, the products produced are a salt in aqueous solution and a gas. While the salt remains in the water as part of a solution, the gas produced will float to the top. Though water vapor pressure will affect the pressure of the gas in the eudiometer, it is possible to apply Dalton’s law of partial pursues to find the dry pressure of the gas. When the dry pressure is determined, the volume of the gas at STP can then be determined and what the experimental volume of one mole of the gas would be at STP.
Excess or lesser amounts of 1.00 M NaOH can lead to inappropriate standardization. Consequently, an incorrect standard solution prepared yielded to the wrong number of moles of NaOH which consequently give us wrong data. Another issue arose with the amount of the indicator used. Since drops are the measurement associated with the amount of phenolphthalein, it is quite difficult to obtain an accurate amount. A slight error in the indicator can shift the endpoint and consequently affects the volume of the obtained NaOH.
This indicates that there is a distinction between controlled and automatic processing. The average difference in time in seconds between the two conditions was 5.29 (≈ 5.288), which demonstrates a significant difference. Furthermore, the scores of both the conditions occurred closed to their means, due to the standard deviations, which were
According to Gregory (1963), this illusion can be due to misapplied size constancy whereby individuals experience depth cue confusion between an interior and exterior room corner. However, Day (1989) opposed this theory and proposed the theory of conflicting cues whereby our perception of the line lengths area are influenced by the actual length of the lines (local feature) and the overall length of the lines (global feature). He argued that this conflicting cues lead to a compromise causing the overall distance between apices and fins to look longer on the lines with fins-out (Day, 1989). Aside from Gregory and Day, Navon (1977) explained the Muller-Lyer illusion using hierarchical letters (Navon Stimuli), whereby larger letters made up of smaller letters were presented to participants to identify the extent of global and local processing biases. In this case, perceptual global processing occurred when individuals were instructed to pay attention to global stimulus, such as the large shape of letters, and perceptual local processing was attained when individuals were instructed to attend to smaller letters (Navon, 1977; Kimchi & Palmer.