Preview

Kno3 Solubility Lab

Better Essays
Open Document
Open Document
1194 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Kno3 Solubility Lab
The investigation was designed to determine the effect of the addition of increasing concentrations of a miscible liquid (ethanol) on the solubility of KNO3 in water. The results of the investigation support the hypothesis that water, which exhibits greater polarity, is able to dissolve a greater mass of KNO3 at lower temperatures compared to tested concentrations of Ethanol ranging from 12.5% to 30%. Furthermore, the results of the graph 1 show correspondence to the dielectric constant of each solvent as both the starting solubility of the solubility curves and the dielectric constant of the solvent decreases from trendline 1 (0% Ethanol) to trendline 4 (30% Ethanol).
According to Graph 1, an inversely proportional relationship is clearly demonstrated between the concentration of ethanol and the solubility of KNO3 …show more content…
It was noted that each trendline of graph 1 displays a clear exponential relationship indicated by strong R^2 values, between 0.974 and 0.995. This exponential trend demonstrates the proportional relationship between the two variables of temperature and solubility, simply stating that the solubility of KNO3 increases exponentially with temperature. For instance, in trendline 1 (0% Ethanol), the first data point at 0 degrees has a solubility of 19.75 grams/100grams of H20 compared to the data point at 60 degrees with a solubility of 120 grams/100 grams of H20. This comparison itself shows the effect of temperature on the solubility of KNO3, demonstrating how rapidly solubility increases with temperature. While all trendlines display this same relationship, they all have different y-intercepts (or known as the starting solubilities). Trendline 1 illustrating the solvent with 0% Ethanol (100% water) is situated at the top of
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    Unit 3 Intermolecular Forces Lab
    • 768 Words
    • 4 Pages

    Unit 3 Intermolecular Forces Lab

    The central goal of this experiment is to depict the intermolecular forces of four different properties of solubility, evaporation, viscosity, and boiling point.…

    • 768 Words
    • 4 Pages
    Good Essays
    Read More
  • Powerful Essays

    Chem Lab 3
    • 1838 Words
    • 8 Pages

    Chem Lab 3

    * Beer’s Law says that there is a logarithmic relationship between the transmittance and the absorbance of a solution. The absorbance value of the samples can be calculated from the measured transmittance values using Beer’s Law. Then the absorbance values would be used to find the equilibrium constant Kc of the reaction. The absorbance of a solution is directly proportional to its concentration.…

    • 1838 Words
    • 8 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Chem 2c Post Lab
    • 1576 Words
    • 7 Pages

    Chem 2c Post Lab

    Enter your calculated molarity of the primary standard KIO3 solution. Please use 3 significant figures.…

    • 1576 Words
    • 7 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    experiment 5 ionic reactions
    • 978 Words
    • 4 Pages

    experiment 5 ionic reactions

    PURPOSE: To see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred.…

    • 978 Words
    • 4 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Papers
    • 301 Words
    • 2 Pages

    Papers

    7. According to my graph 120 g of KNO3 will not completely dissolve in 100ml at 40 C because the temperature would have to be at least 69 C for it to dissolve completely.…

    • 301 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Solubility Lab
    • 653 Words
    • 3 Pages

    Solubility Lab

    What explains the solubility trends that you can deduce from the results for the tests done in each solvent? A. B. C. Methyl alcohol is more like water in its structure Each alcohol can form hydrogen bonds with water As the carbon chain of each alcohol becomes longer, the alcohol becomes more hydrocarbon-like. They are all equally soluble in hexane.…

    • 653 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Resolution of Matter into Pure Substances: Paper Chromatography
    • 307 Words
    • 2 Pages

    Resolution of Matter into Pure Substances: Paper Chromatography

    The purpose of this laboratory was to determine how different substances have different solubilities in a given solvent. This was accomplished using the method of chromatography. The solubility of each substance was first determined by dropping a drop or two of each on a line drawn 2 inches above the bottom of a piece of paper. Then the paper was lightly bent in order to tape both sides of the paper leaving about a 4 centimeter gap so that the sides of the paper are not touching. The paper was then put into a beaker of a hydrochloric acid, ethanol, and butanol mixture, being sure that the paper does not touch the sides of the beaker, and then topped. After the eluting solution has risen to within two centimeters of the top of the filter paper, the paper was removed from the beaker, dried, and was stained with a staining reagent solution containing potassium ferrocyanide and potassium iodide. This reagent forms colored precipitates or reaction products with many cations, including all of those used in this experiment. The distance of which the spots moved were determined by calculating the Rf value of each substance. The Rf value is determined by following formula:…

    • 307 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Lab Solubility
    • 1220 Words
    • 5 Pages

    Lab Solubility

    The main purpose of doing this lab is to learn how to interpret solubility graphs and how the temperature does affects the solubility of different substances. There are other objectives of the lab which are learning what are concentrated, diluted, supersaturated, and saturated substances and how can they be identified. The hypothesis of this lab would be that when temperature increases, the amount of salt and copper sulfate that can be added in the water and be dissolved will increase.…

    • 1220 Words
    • 5 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Formal Lab Report
    • 433 Words
    • 2 Pages

    Formal Lab Report

    The data recorded in the graph is related to my hypothesis about the relationship between concentration and temperature. It shows that when a solution of water and potato is put into different temperature…

    • 433 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Better Essays

    Potassium Iodide Lab
    • 948 Words
    • 4 Pages

    Potassium Iodide Lab

    We learning about how ions dissolve in water and also how dissolved ions of different compounds react with each other and finally examine the final product for the presence for ions.…

    • 948 Words
    • 4 Pages
    Better Essays
    Read More
  • Good Essays

    Solubility Lab
    • 815 Words
    • 4 Pages

    Solubility Lab

    For part A of the procedure we worked with the solubility of solid compounds in various solvents. The three solid compounds that were worked with during this procedure were benzophenone, malonic acid, and biphenyl. These three solids were then mixed with water (highly polar), methyl alcohol (intermediately polar), and hexanes (nonpolar). When benzophenone is mixed with water the results turned out to be insoluble because benzophenone is a pure hydrocarbon, which are very insoluble in water. When benzophenone was mixed with methyl alcohol, it was soluble because Methanol can hydrogen bond to the carbonyl oxygen of benzophenone. When benzophenone was added to hexanes it was partially soluble because “likes dissolve likes” benzophenone is polar and hexane in non polar. When the next compound, malonic acid was combined with water and with methyl alcohol it turned out to be soluble in both cases. However when malonic acid was combined with hexanes it was in soluble because Malonic acid is polar where as hexane is nonpolar. When the final compound, biphenyl was added to water it was insoluble because biphenyl is a non-polar molecule. Biphenyl was partially soluble when it was added to methyl alcohol but when hexane is added it is soluble because both are non-polar and "likes dissolves likes". For part B of the procedure we worked with the solubility of various alcohols in water and hexane. The three alcohols we used were 1-octanol, 1-butanol, and methyl alcohol. When 1-octanol was added to water it is insoluble because the longer the carbon chain, the more water is repelled. However when 1-octanol was added to hexane it was soluble because it is a polar molecule being that it is an alcohol. When 1-butanol is added to water it is partially soluble because 1-butanol slightly polar. Which means that it was soluble in hexane. When methyl alcohol was added to water it was…

    • 815 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Two Types of Solids
    • 1574 Words
    • 7 Pages

    Two Types of Solids

    The purpose of this lab is to study some of the physical properties of two types of solids – ionic and molecular. The samples used are sodium chloride (ionic) and camphor (molecular). The physical properties studied are odour, hardness, melting point, solubility in water and solubility in 2-propanol. It is observed that some of the physical properties of sodium chloride are no odours, hard, a high melting point, soluble in water and insoluble in 2-propanol; some of the physical properties of camphor are a strong odour, soft, a low melting point, insoluble in water and soluble in 2-propanol. A few conclusions can be drawn from these observations. The particles in ionic solids are held tightly by the force of attraction between ions with opposite charge, because of this strong force of attraction of positive and negative, ionic solids tend to have no odours, a high melting point and they are hard. The particles in molecular solids are held by the van der Waals force of attraction, because of this relatively weak force of attraction, molecular solids have a strong odour, a low melting point and they are soft. Sodium chloride dissolving in only water (not in 2-propanol) and camphor dissolving in only 2-propanol (not in water) have proved that polar solids are soluble in polar liquids only, and non-polar solids are soluble in non-polar liquids only.…

    • 1574 Words
    • 7 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Chemical Properties Lab
    • 305 Words
    • 2 Pages

    Chemical Properties Lab

    Procedure: I used various different tools to investigate the different physical and chemical properties, such as blue and red litmus papers, beakers, and wells.…

    • 305 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Chemistry Lab
    • 624 Words
    • 3 Pages

    Chemistry Lab

    The purpose of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred.…

    • 624 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Spectrophotometric Analysis of Kmno4 Solution
    • 1686 Words
    • 7 Pages

    Spectrophotometric Analysis of Kmno4 Solution

    The purpose of this analytical laboratory experiment is to determine the unknown concentration of potassium permanganate (KMnO4) solution by finding its absorbance through the use of spectrophotometer. The preparation of four known concentration of KMnO4 was done namely, 2.00×10-4M, 1.50×10-4M, 1.00×10-4M, 5.00×10-5M, respectively and is to be place on the spectrophotometer with the unknown and distilled water for the determination of each concentration’s absorbance. As the concentration is proportional with the absorbance of the solution, to determine the concentration of the solution is possible by drawing a graph of concentration against the absorbance. At the end of the experiment, the group found the concentration of the unknown sample is 2.50×10-4M.…

    • 1686 Words
    • 7 Pages
    Powerful Essays
    Read More

Related Topics