Chemical Principles in the Laboratory
11th Edition
ISBN: 9781305264434
Author: Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher: Brooks Cole
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Why should deionized water to be used throughout the analysis?
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Briefly explain the reasons for the use of the following techniques in this experiment.
a. The hydrate salt is heated with the crucible cover in an ajar position rather than in a fully seated position or having the crucible completely uncovered.
b. The crucible cover is fully seated during cooling and weighing of the residue.
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- 1. Complete and turn in the Data and Calculations page for this experiment. Include calculations for the determination of the exact concentration of your group’s EDTA solution, and the Ca2+ ion concentration (in M) and the hardness (in ppm CaCO3) of yourunknown water sample. Organize and label your calculations and report all measurementsand calculations with the correct number of significant figures.2. How would you characterize the precision of your experimental measurements in this lab?Is the level of precision reasonable or unreasonable? Explain your answer. Data and Calculations PageRecord all of your group’s experimental data below. Carry out and include all of the calculations needed to determine the Ca2+ ion concentration (in M) and the hardness of your unknown water sample (in ppm CaCO3). Attach additional pages as needed.arrow_forwardSome procedures include the addition of sodium carbonate before liquid-liquid extraction. What is the purpose of this step?arrow_forwardWhat is the result in this experiment? ESTIMATION OF SODIUMHYDROXIDE USING HYDROCHLORIC ACID (CONDUCTOMETRIC TIITRATION)arrow_forward
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