A student received a mixture that actually contained 50.0% salt and 50.0% sand.At the end of the experiment, this student calculated that his sample was composed of 45.2% salt and 54.8% sand. What might he have done (or not done correctly) during the experiment to cause this error in his results?A student obtains the following data:Mass of evaporating dish 25.87 gMass of dish with mixture sample 28.12 gMass of beaker 146.36 gMass of beaker with dried salt 147.10 g Mass of evaporating dish with dried sand ???However, this student spills her sand sample out of the evaporating dish before weighing it.If the student believes in the Law of Conservation of Mass, what should have been the weight of the evaporating dish with the sand in it? Show your work.4. A student receives a sample of a mixture with three components, solid iodine that is removed first from the mixture by evaporation, solid salt that is dissolved to separate it from the third component, solid sand.The salt and sand are dried and weighed but the iodine escapes as a gas and is not recovered.The student starts with 8.35 g of mixture and recovers 2.37 g of salt and 4.11 g of sand.What is the percent of each component in the original mixture?Show your work.(Attach a separate sheet of paper, if necessary.)
Recent Comments