T o me as ur e th e acc ur at e an d in acc ur at e me as uri ng li qui d vo lum e ap par at us bas ed on calculated volume from weight and density information. A control was the water the salt water density was compared to, and another control was the volume of liquid used in all trials of water and salt water. Tap water 14 Celsius b. I will be using laboratory equipment to prepare dilutions and calculate them while using an algebraic formula. Given that the theoretical density is 19. The first 2 digits 1.
Submit as directed by your instructor. Key findings: For each lab, you should provide a table or a graph with what you believe is the key results. A sample of gold Au has a mass of 26. Water Temperature °C Temperature °F Temperature K Hot from tap 47. There is a density experiment done at North Seattle University which measures the densities of water and of salt water. However, when using analog instruments such as rulers and thermometers, the experimentalist is responsible for determining the correct number of significant figures.
To find the precision, you basically take the smallest unit on your measuring device, and add a decimal place the uncertain digit. Describe two variables that affect the rate of diffusion. The group was to measure the length and the width of the table a total of twenty times; with a group a four each individual measured the table length and width a total of five times each. Some chemical reactions generate heat and are called exothermic reactions while others absorb heat and are known as endothermic reactions. When making measurements, it is important to be as accurate and precise as possible. We use this form of description for almost everything living and non-living in our world today.
In Part D, a thermometer will be used to measure temperature in degrees Celsius °C. Density of saturated solution 1. The calculated density of the unknown is expected to be as far away from the true value as the calculations made the calculated value of the density of the brass rod far away from the true value of the density of the brass rod. The four sources that could be the point of contamination are a new subdivision, textile plant, an organic farm, and a mountain lake. When read from the lowest point of the meniscus, the correct volume reading is 30. Press the open end of the capillary tube into the powder. Often, this information is quantitative, in the form of measurements.
Methods of dialysis and gel filtration chromatography will be used to separate a glucose monomer from a starch polymer. Our knowledge of chemistry and chemical processes largely depends on our ability to obtain correct information about matter. The correct reading is 1. Also to gain an understanding of propagation of errors while enhancing knowledge of precision and accuracy. Length is any measure of a dimensioned distance Ponomareva and Shpakov, 2012.
Then turn the tube over and tap the tube lightly against the lab bench to allow the powder to fall into the sealed end. Gain proficiency with some of the common measuring devices used in a chemistry laboratory 3. Since this was the first lab the many of the students have probably done in a couple years, I see plenty of room for human error do to the lack of training or experience with most of the lab equipment required to compete this lab to the full. Procedure: I used a ruler, thermometer, and scale to take measurements. Throughout lab one we were introduced to… 3028 Words 13 Pages Lab One: Laboratory Techniques and Measurements Abstract The Lab One was done on Laboratory Techniques and Measurements.
Title: Laboratory Techniques and Measurements 2. The metric system, the most common set of measurements used in science, which includes meters, liters, Celsius, and grams will be used. Data Table 2 Temperature Measurements Water Temperature C Temperature K Hot from tap 50 323. If the mass is 21. I was able to make most of the appropriate measurements with little to no error at all.
The titrant is added to the analyte in a conical flask until the color of the analyte changes, this point is known as equivalence point. It could have been measured after it started boiling C. Density tells us that it is defined as the mass per unit measure, in which as we know is most oven referred to as volume and is also used to describe how heavy something is. In general, the more decimal places provided by a device, the more precise the measurement will be. The importance of identifying microorganisms is essential to the survival of humans, expansion of modern day medicine and improvement of quality of life. The melting points given in the table represent the lowest temperature in that range, where liquid formation is first observed.