The instructor reveals that the weak acid is hypochlorous acid, HOCl. The known Ka for HOCl is 4.0×10-8. What is the percent error in the experiment?
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The instructor reveals that the weak acid is hypochlorous acid, HOCl. The known Ka for HOCl is 4.0×10-8. What is the percent error in the experiment?
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- An excess of 0.34 mg Pb is obtained from an assay test determined in an analysis. What is the percent relative error in ppt if the mass of the sample is 550 g?The color change of a chemical requires an overtitration of 0.04 mL. Calculate the percent relative error if the total volume of the titrant is 50 mL.What are the types of gravimetric methods? Give an examples where each method is used in an analysis.
- What do you call the type of analytical method that relies on the absolute stoichiometric equivalences of balanced chemical reactions in order to compute the amount of analyte present in the sample? a.Oxidative methods b.Classical methods c. Blank Correction Methods d. Instrumental methodsWhat is the importance of calibrating analytical balances?Given that the concentration of ascorbic acid is sim0.001 Mi in lemon juice, is this error significant? Why or why not?
- The analysis shows different concentrations based on replicate determinations of Zn in a water sample: 0.754 mg, 0.721 mg, 0.734 mg, 0.731 mg and 0.742 mg. What is the absolute error if the standard solution has 0.750 mg of Zn?what is the significance of gravimetry analysis?For EACH type of gravimetric analysis:Give actual applications of each analysis. Include the SPECIFIC methodology for each sample chosen.
- You have finished two trials of the sample analysis for the experiment and you noticed that the burette is almost empty (~5 mL remaining). Should you add more titrant before the next sample analysis or not? Why or why not? Select one: YES. It will not affect the calculations and not cause error NO. It will affect the calculations and cause error Neither A nor B Cannot be determined1. A student performed this experiment and obtained the following concentration values: 0.02813 M, 0.02802, and 0.02788 M a. what is the mean concentration? b. what is the standard deviation of these results? 3. how would the following errors affect the concentration of Cl- obtained in question 2b? give your reasoning in each case. a. the student read the molarity of AgNo3 as 0.02104M instead of 0.02014M b. the student was past the endpoint of titration when he took the final buret reading.Consider the structure of testosterone to identify the best suitable quantitative analysis for testosterone?