Question

at 15.0°C 20.0°C, 22.0°C, 25.0°C, Post-Laboratory Questions 1. Write down the values for the density of water at 15.0°C, 20. and 28.0°C. a. Compare the values of the density of water at the above temp temperature affect density? If so, state how. Explain your rease Fat the above temperatures. Does b. Would temperature be a significant source of error for this experiment? Explain your reasoning. 2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities: 1.30 g/ml, 1.35 g/mL, 1.32 g/mL, 1.23 g/mL, 1.13 g/ml, and 1.39 g/mL. a. Calculate the average density of chloroform from his data. b. If the accepted density of chloroform is 1.48 g/ml, calculate the percent error. c. Was Riley's data accurate? Was the data precise? Explain your reasoning, Experiment 1: Determination of the Density of Water and of an Unknown Solid Sample

Answer 1

white down the values for the density of water at 150c, 20.06, 22.0°c $25.0° and 28.0%, a coropare the values of density of watle at the above teroperatures. Does temperatuse affects dessity? If so stelte how. Explain your a reasoning. en Deosfty of wate ad temperature is as follows. - Temperature Density. D 15.0°C 0.99 gogg I 20.0°C 0.998 203 22.0°C 0.991470 25.0c 0.997044 27.00 di 9 9 6232 * Temperature affects the density, They are investly proposta -osal to each other. If the teropeserture g sure the dessity will be less, because the volume increases upoo increasing temperaturl. by Would tempererfuse be a significant source of eromor tur. they expellmest explain your reasoning, -Answer yog, teroperature be a sigoificant source of erron for this experimest. Dessety increases as the temperature deereales... They s reou on why liquid wally is morse desse than solid watly the bonds in the wally bee break mune slowly as temperature decreases and the stroructure tesd. to trop fewer extra water molecules. Doorlty R a mass of any material per unit volume Remember that temperaturets related to the average Kloetic energy of atoms or moleculls withes the substance We know that for gases, the volume is directly proportional to temporerture by the equation ProART.