Calibration of Volumetric Glassware free essay sample

The temperature should be recorded at uniform intervals. Weighing to the nearest milligrams will be satisfactory and the use of a top loading is sufficient. (i) Weigh an empty bottle to the nearest milligram. (ii) Fill the pipette to the mark with distilled water (iii) Drain the water by gravity into the weighing bottle and cap the bottle to prevent evaporation. (iv) Weigh the bottle again to find the mass of the water (v) Use the following equation to convert mass to volume: Actual Volume = grams of water ? volume of 1 g of H2O 2) Calibration of a volumetric flask (100ml) (a) Get a 100 ml volumetric flask. Make sure the flask is clean and dry. Weigh the flask to the flask to the nearest milligram. (b) Fill the flask to the mark with distilled water and weigh again. (c) Calculate the mass of mass of water contained in the flask (d) Convert the mass of the water to volume 3) Calibration of a measuring cylinder (50ml) Calculate the mass of water contained in the cylinder and convert it to volume by the procedure you think most appropriate. We will write a custom essay sample on Calibration of Volumetric Glassware or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Temperature, Â °C| Volume, mL at T Â °C| 20| 1. 0028| 21| 1. 0030| 22| 1. 0033| 23| 1. 0035| 24| 1. 0037| 25| 1. 040| 26| 1. 0043| 27| 1. 0045| 28| 1. 0048| 29| 1. 0051| 30| 1. 0053| 31| 1. 0056| 32| 1. 0058| 33| 1. 0061| The standard deviation value represents the average distance of a set of scores from the mean. It statistical measure of the precision for a series of repetitive measurements. The sample standard deviation,s, is the positive square root of the sample variance. Average volume (mL) : Standard deviation : Relative standard deviation : Discussion Temperature of surrounding influence the volume of the water. Temperature does not influence the mass of the water. Conclusion Volume of water is influence by the temperature. Mass is fixed does not influence by temperature. The water drops inside the apparatus make the ending data less accurate. Volume is not fixed than mass. Using mass as measuring unit is more accurate.