Knowing the Interrelationship Between the Consolidation of Sodium Chloride Mixtures and Their Densities Chemistry 1A Lab 5pm Th, Department of Chemistry, California State University Fresno Professor Nimavat Experiment Conducted: 1/25/18 Report Submitted: February 15th, 2018 Alex Luna* and Ellen Introduction: Density is defined as the ratio between mass and volume or mass per unit volume. It is a measure of how much stuff an object has in a unit volume. This report discusses an experiment to find out if there is a correlation between a salt solutions concentration and its density. Conduct 3 separate trials and take data measurements to determine the density of each salt solution. Determine the best procedure for measuring density (Beaker, …show more content…
Equation 1: Absolute Error = Experimental Value – Accepted Value Equation 2: Standard Deviation: Equation 3: Density (ρ) = Mass (m) / Volume (V) Equation 4: General Methods and Materials: In this experiment, the materials used were provided by California State University, Fresno chemistry stockroom. We used a lab coat and lab goggles. The materials used was a 10mL volumetric flask, and an electric balance. Procedure: In order to begin the experiment we need to understand our objectives. Know how to use an electronic balance, calibrate glassware, and know how to use a volumetric flask, calculate density and know how to calculate the percent error. The first thing we need to do is determine the best procedure for measuring density. The materials needed are going to be a 10mL volumetric flask. Conduct 3 separate trials where we will measure the density between different salt solutions. In this experiment we have 6% salt solution, 12% salt solution, 18% salt solution and 24% salt solution. We are going to weigh out the mass of the dry glassware, which will be a volumetric flask, and then the mass of the glassware with the water in it. After we measure the glassware with the water in it …show more content…
It is important to keep track of all of your data and format it in an organized matter. One thing that caused confusion in this experiment was jumping around from different measurements instead of going through them in order. Also there was some miscommunication in our group. Assign certain tasks to small groups within your group to eliminate some time and receive a more accurate measurement. The experiment tells us that the higher the amount of percent salt solution that’s in the volumetric flask, the higher the density will be. Acknowledgements: Acknowledgements to our professor Ms. Monika Nimavat, California State University, Fresno, the tutors in the learning center for their patience and their help. +++
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The gummy bear's mass and volume will increase while the density of the gummy bear would decrease after it is put into water overnight. (#)This lab experimented to figure out wah changes would take to the gummy bear’s mass, volume, and density after sitting in a cup of water overnight. To do this the gummy bear's dimensions and weight was taken on the first day, along with its density and then the gummy bear was placed and water. When the gummy bear was taken out of the water on day two, the dimensions, weight, and density were taken again, and the difference between the two days was found. (#1)
Materials: The materials that I will be utilizing during these experimentations are three to four ice cubes, one cup for measuring, six unblemished cups, one stopwatch, one hot water source, three tablets of Alka-Seltzer, one thermometer that measures from negative
By reading the new volume of the liquid substance amount one will then subtract the initial milliliter amount from the final volume reading, thus giving you the volume of the rock sample. Using the mass of the sample rock obtained one will then divide the final volume reading unveiling the density of the
Introduction Metabolism is the sum of all anabolic and catabolic reactions within a living organism to sustain life. The energy required to perform these reactions is provided by oxygen in the form of ATP, therefore the oxygen consumption rate can be measured to determine the metabolic rate. Since oxygen is obtained through respiration, the efficiency of an organism’s respiratory system affects its metabolism. Previous studies have shown that caffeine affects the human respiratory center and occasionally dilates bronchus. It can thus stimulate human respiration and increase the metabolic rate (Haggins et al, 1915).
1. 150 ml of boiled water was poured into each of the three beakers labeled A, B, C. 2. Five tea bags were soaked for the time given by the manufacturer (two minutes) , in beaker A (Control). The teabags were immediately removed after the time elapsed. 3.
Next, I removed the water and the quarter from the graduated cylinder and poured 50 mL of water again. I repeated this until I got results for all three coins. To find the volume of each coin, the formula I used was volume of water and coin - initial volume of water ( 50 mL ). To find the density, I divided the mass and the volume of each
Introduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis.
In this experiment, the amount of water lost in the 0.99 gram sample of hydrated salt was 0.35 grams, meaning that 35.4% of the salt’s mass was water. The unknown salt’s percent water is closest to that of Copper (II) Sulfate Pentahydrate, or CuSO4 ⋅ 5H2O. The percent error from the accepted percent water in CuSO4 ⋅ 5H2O is 1.67%, since the calculated value came out to be 0.6 less than the accepted value of 36.0%.This lab may have had some issues or sources of error, including the possibility of insufficient heating, meaning that some water may not have evaporated, that the scale was uncalibrated, or that the evaporating dish was still hot while being measured. This would have resulted in convection currents pushing up on the plate and making it seem lighter by lifting it up
Materials 1 calibrated thermometer, 1 scale that reads mass, 2 Styrofoam cups, 1 small lead sinker, boiling water in a beaker, 1 pair of kitchen tongs, 1 small cooking pot, stove top, distilled water, and 1 pair of safety goggles (I did not use a cork stopper). III. Procedure First, the beaker
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip.
Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, definitions of each relating factor were researched, leading to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound is formed when two or more nonmetal atoms share valence electrons; covalent compounds are also categorized into two sections: polar covalent and nonpolar covalent. Furthermore, polar covalent compounds dissolve in water, while nonpolar covalent compounds do not.