Density, accuracy, precision and graphing the determination of the density of water a comparison of the accuracy and precision of a graduated cylinder and a pipet. Measurement of density purpose: the purpose of this experiment is to determine the densities several substances, and to express the accuracy and precision of the experimental values. 0107 accuracy and precision: virtual lab—measurement content on this page requires a newer version of adobe flash player text-only version [ close this window. Chm115 lab 1 precision, accuracy and density review the safety policy before coming to lab you need to know all the safety rules dress appropriately bring a notebook, safety glasses and the hand-written procedure.
In lab, we did an experiment to determine the accuracy and precision for the measurement of volumes for four measuring devices: the smallest beaker in our lab drawer, a 10ml graduated cylinder, a 100ml graduated cylinder, and a burette. Transcript of lab report: accuracy and precision of different problem get the actual weight of the tap water from different instruments the true value should be 30 ml= 30 g (the density of water being 1 g/ml) 4 repeat the procedure to get 3 trials for every measuring instrument and record your data materials. In this lab, you will compare the accuracy and precision of densities of solids measured by two different techniques: volume displacement and volume calculation using calipers mass and linear measurements are basic units in the metric system.
The accuracy and precision of each test method are established and are frequently monitored by the professional laboratory personnel sensitivity and specificity data are determined by research studies and are generally found in medical literature. Abstract- expirement 1: precision, accuracy, and density measurements this experience is intended to introduce the proper use of the most used laboratory equipments and glasswear that is come upon in the lab. Precision was found by taking the absolute value of the highest density minus the lowest density, dividing that difference by the average density, and then multiplying that answer by 1000 for example, the precision for the water was found by this equation: |(09958 g/ml – 09650 g/ml)| / 09823 g/ml x 1000.
0107 accuracy and precision: balance lab worksheet before you begin: you may either copy and paste this document into a word processing program of your choice or print this page procedure: access the virtual lab and complete the experiments. Blair savelli lab partners: kody brusso and angel penn 9/26/11 dr rhode density, accuracy, precision, and graphing abstract-the purpose of this lab was to determine the density of water and a saline solution, compare accuracy versus precision with the use of a graduated cylinder and volumetric pipet, and also to learn how to graph data correctly. 1 experiment 1 precision of measurements density of a metal cylinder physics is a quantitative science, relying on accurate measurements of fundamental properties.
Precision refers to how exact a measurement is and how closely it can be reproduced accuracy describes how close a measurement is to the true value the density of an object is its mass (m) divided by its volume (v. Because accuracy and precision are dealing with measurements, we see these terms most often in reference to the laboratory setting imagine a chemist who is conducting an experiment to see how. Experiment #2 – measurements, accuracy, and precision laboratory overview chem 1361 august 2012 gary s buckley, phd •select the most appropriate piece of lab glassware to make volume •density background •accuracy and precision •basic statistics – average and standard deviation.
Lab no1: density, accuracy and precision aim: to determine the relative precision and accuracy of different glassware items by calculating the density of a known substance introduction: the density of a substance is its mass per unit volume. Accuracy is a particularly important concept because it is foundational to the quality of laboratory measurements accuracy invokes an image of something that is correct, reliable and trustworthy. Science 122 laboratory lab 5 the science of measurement: accuracy vs precision back to how to measure back to lab 5 the dictionary definitions of these two words do not clearly make the distinction as it is used in the science of measurement. The density is calculated as the ratio of these measurements the term measurement will be reserved for quantities that are directly measured accuracy and precision in measurements accuracy is the agreement between an experimental value, lab_app_accuracy.
Measurements and accuracypurpose find the beaker which has the most precise and accurate (from the table in sheet. Precision and accuracy of different glassware items section 2 — determine the density of a salt water solution using the most precise and accurate piece of glassware determined in section 1. Accuracy and precision: accuracy refers to the closeness of a measured value to a standard or known value for example, if in lab you obtain a weight measurement of 32 kg for a given substance, but the actual or known weight is 10 kg, then your measurement is not accurate.