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Metrology Essay Topics & Paper Examples

Oscilloscope and Digital Voltmeter

A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter. Voltmeters are made in a wide range of styles. Instruments permanently mounted in a panel are used to monitor generators or other fixed apparatus. Portable instruments, usually equipped to also measure current and resistance in the form of a multimeter, are standard test instruments used in electrical and electronics work. Any measurement that can be converted to a voltage can be displayed on a meter that is suitably calibrated;…

Dissociation Constant Weak Acids

Introduction: The dissociation constants of weak monoprotic acids were determined with the aid of a buffer and pH meter. Experiment: This experiment was performed according to the procedures as provided in the Chemistry 111B laboratory manual: Po, Henry and Senozan, N. “General Chemistry Experiments Chemistry 111B”, 8th Ed., 2004 Hayden-McNeil Publishing, pp 80-88. To determine the dissociation constants of weak monoprotic acids (HX and HY), a buffer was needed to calibrate the pH meter. According to the manual, all four solutions to the experiments had to be carried out first before the calibration was performed. The following materials were obtained to conduct the parts of the experiment: 1) several 10-mL and 50-mL graduated cylinders to measure the volumes of acid…

Effect of Temperature on a Reaction

Materials: 1). 0.02 mol dm-3 Potassium Manganate2). 0.2 mol dm-3 Glucose3). 2 mol dm-3 Sulphuric Acid4). 50 cm3 Burette5). 250 cm3 Beaker6). Measuring Cylinder7). Thermometer (-10 to 110 oC)Hypothesis:By adding glucose to a solution of KMnO4 and H2SO4, the solution will turn colourless and it will take a specific time for the reaction to complete. By increasing the temperature, the time it takes (the rate) for the solution to completely change to colourless will be increased. Thus it can be said, that it is being hypothesized that an increase in temperature will cause an equal increase in the rate of the reaction. Method: 1). Using a measuring cylinder, place 50 cm3 of sulphuric acid into a 250 cm3 beaker, add…

Atomic Isotopes

Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Dont forget to save your lab report to your computer Reference Isotope Half-Life Chart Isotope ProductHalf LifeCarbon-14Nitrogen-145730 years Potassium – 40Argon – 401,280 million yearsRubidium – 87Strontium -8 748,800 million yearsThorium – 232 Lead 20814,010 million yearsUranium – 235 Lead – 297704 million yearsUranium – 238 Lead – 2064,470 million years Activity 1 Calibration Place your data from Activity 1 in the appropriate boxes below. Calculate the age of the calibration standards using the following information. Fraction of sample remaining remaining ppm of sample/initial ppm of sample Age of sample half-life value of isotope X number…

Free Fall

The purpose of this experiment is to understand why we have variances in measurements and how to reduce the variances. When taking a measurement there are multiple factors that affect its value. The more the measurement is taken the measurements average is closer to the actual value. Other factors include the instruments calibration, cleanliness of the inside of the measuring arms and human error in reading the measurements off of the measuring devices. For this experiment, we followed the procedures as indicated in the lab manual. Data Results/Comparison to Theory / Answers The caliper and the micrometer were checked for the calibration. The results showed zero offset before and after experiment. Since there are differences in the measured data; the…

´╗┐Calibration of Volumetric Glassware

Summary In this experiment, The purpose of this experiment is to investigate the measurement of the actual volume contents of volumetric glassware. In the beginning of the experiment, the volumetric glassware should be clean and dry before used. The volumetric glassware, measuring cylinder and pipette should be handled with care and all the precautions were be taken during the experiment was held. This was to ensure to avoid any errors such as parallax error especially while reading water meniscus. This experiment must be repeated three times or more and take the average reading to get more accurate data. By using the formulae, the standard deviation and relative standard deviation could be calculated. As the result, the lower the standard deviation,…