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.
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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.
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- You are preparing a 100.0 mL standard solution needed for titration analysis. The NaOH (40 g/mol) pellets are measured to be 0.5341 g in a balance with acceptable uncertainty of +0.001 g. Mass of the pellets is recorded after taring the container. The pellets are put in a beaker and added with 50 ml distilled water measured by a graduated cylinder. The solution is then quantitatively transferred to a 100-mL volumetric flask with uncertainty of ±0.08 mL and diluted to a 100-mL mark. What is the concentration (M) of the solution and estimate its uncertainty by propagation? Assumption: There is no uncertainty in molar mass. Express your answer as C+/- u M.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?A student performed titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant. How will his experimental error affect the calculated value for the concentration of unknown acetic acid? calculated value actual value. calculated value < actual value calculated value = actual value. more information is necessary this is not a source of error
- The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the percent relative error if the total volume of titrant is (a) 50.0 mL (b) 10. 0 mL (c) 25.0 mL (d) 30. 0 mLThe molarity of a solution is determined by four separate titrations or replicates, where the obtained data was 0.4120, 0.4920, 0.3920, 0.4888 and 0.4320 M. Calculate the standard error of the mean for the above data.You want to determine the concentration of NaCl in a water. In preliminary analysis, it appears to be saline water with a NaCl content of approximately 4%. Should you dilute the sample if your titrant has a concentration of 0.1 M and you want to spend 25 mL of sample? Solution: You must dilute approximately ten times, taking 10 mL of sample and making up to 100 mL. In this way, 17.20 mL of titrant will be spent.
- A student conducts the experiment as outlined in the posted procedure, and records the following data. Calculate the concentration (M) of calcium ions in the filtered solution. [HCl] (M): 0.0108 initial buret reading (mL): 2.49 final buret reading (mL): 44.16 Your Answer: Answerwhat is the significance of gravimetry analysis?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?
- Anna Divi, a young and ambitious researcher, is planning to put her very own research laboratory. However, she does not have the funds for this to happen. She then approached Alan Read, CEO of a well-known funding agency, to help her pursue her dream laboratory. Before Alan considers Anna's proposal, Anna must perform an experiment on determining the melting point of solutions. She must have an accurate result with a percent error not greater than 3%. The data on the experiment is given below. Help Anna achieve her goals by performing the necessary calculations below. Table 1. Data on the determination of the melting point of the solution. Parameters Values Theoretical freezing point of solvent, °C 65.8 Freezing point depression constant (kç) of solvent, °C m-1 2.49 mass of solute, g 0.250 mass of solvent, g 2.100 molar mass of solute, g mol-1 148.21 A. Calculate the molality of the solution. B. Calculate the theoretical freezing point of the solution. C. Anna performed the same…A student conducts the experiment as outlined in the posted procedure, and records the following data. Calculate the concentration (M) of calcium ions in the filtered solution. [HCI] (M): 0.0103 initial buret reading (mL): 3.94 final buret reading (mL): 33.94A NaOH solution was titrated using potassium hydrogen phthalate (KHP, 204.22 g/mL, 99.90% purity) and phenolphthalein as indicator. Four samples of the pattern of 0.7987, 0.8039, 0.8104 and 0.8365 grams were weighed. These consumed 38.29 mL, 38.29 mL, 38.51 mL, and 39.96 mL, respectively. Calculate: A) the average molarity of the base. B) the standard deviation of the molarity and the 95% confidence limits