CH 202

1. 4.78/5 points | Previous AnswersNCSUGenChem202LabV1 1.T.001. Significant Figures Tutorial Significant figures and decimal places play an important role in science because they are a proxy for measurement precision. Chemistry, being an experimental science driven largely by precise determinations of specific amounts, requires the use of precision in answering scientific questions. The rules WebAssign follows are generally accepted and may even be spelled out in your textbook. If you want...

In-Lab Question 1. What are the initial concentrations of iodide, persulfate, and thiosulfate in the first run? Account for dilution and show your work on the worksheet. Enter your calculation in Data Table B. In-Lab Question 2-3. What is the rate of the reaction in the first run? Show your work on the worksheet. Enter your calculation in Data Table B.

To quantitatively "throw out" a measurement, you must perform a statistical test on your data called a Q-Test. The formula for the Q-test is Qcalculated = gap/range where gap = (questionable value ! next closest number) and range = (largest number ! smallest number). Qcalculated is then compared to Q table. If Qcalculated > Qtable then the questionable datum can be discarded

consider what would have happened if one of the other mechanisms had been correct. The initial reaction is run with arbitrarily selected concentrations of reactants. Then, concentrations are varied systematically. Consider the following possibilities and select the correct outcome for each experiment. (a) If the first mechanism is correct, what should happen to the rate if the concentration of iodide ion is doubled and other concentrations are held constant?