Determination of copper in brass from iodometric titration. Do the calculations. The volume of Sodium thiosulphate that we got after the titration for three trials was 28.02ml, 30.755ml, 29.635ml.The weight of the brass samples are 0.2028g, 0.2252g, 0.2104g. Please do all the calculations, also make a table and do the error analysis as well.

Which among these is the most important piece of data in a gravimetric analysis?   Mass of analyte   Mass of weighing form   Mass of crucible   Mass of precipitating agent

Example You determine the acetic acid content in vinegar by titrating with a standard (known concentration) solution of NaOH to a phenolphthalein endpoint. 5.023± 0.003 g sample of vinegar is weighed. The NaOH must be standardized by KHP and 3 such titrations gave molarities of 0.1167, 0.1163 and 0.1164 M. A volume of 36.78 ± 0.03mL NaOH is used to titrate the sample. What is the percent acetic acid in the vinegar and what is the overall uncertainty?Answer: 5.12% ± 0.01%

A mixture has thre components. The percentage of sand was determined to be 26.04%, the percentage of benzoic acid was determied to be 25.92%, and the percentage of salt was determined to be 35.97%. Calculate the total precent recovery.

A student performed a titration to determine the exact concentration of NaOH(aq).  The titration was performed against a standard 0.1000 M HCl(aq) solution.  Phenolphthalein indicator was used.  The following end-point volumes were recorded by the student in units mL: Trial Number Volume 1 25.06 2 25.15 3 25.02 4 25.17 5 25.07 Calculate the 95% confidence limit.  Assume that there is no outlier.  Provide your answer to the correct number of decimal places, without units, and without the ± sign. Use the T-table shown below.

A 0.1093-g sample of impure Na2CO3 was analyzed by the Volhard Method. After adding 50.00 mL of 0.06911 M AGNO3, the sample was back titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the end point. Report the purity of Na2CO3 sample.

A 0.1093-g sample of impure Na2CO3( Molecular weight 106) was analyzed by the Volhard method. After adding 50.00 mL of 0.06911 M AGN03 (Molecular weight 169.87), the sample was back titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the end point. Report the purity of the Na2CO3 sample.

Silver nitrate can be standardized using primary standard KCl.  A dried sample of analytical grade KCl of mass 0.918 g was dissolved and diluted to 250.0 mL.  Repeat 10.00-mL aliquots of the potassium chloride solution were titrated with the silver nitrated solution.  The mean corrected titration volume was 8.98 mL Calculate the molarity (M) of the silver nitrate solution.

Pls help ASAP. Pls show all work and calculations.

You took 25.00 mL of unknown water solution and titrated it with EDTA. The EDTA solution molarity was 0.01 M, and it took 16.50 mL to reach the end point. With the blank it took only 0.98 mL to reach end point. 15.52 mL of EDTA solution were used to titrate hardness that actually came from the unknown 1.552×10−4 moles of EDTA reacted with hardness-causing ions from the unknown sample 1.552×10−4 moles of hardness-causing ions were present in the unknown sample A) Assuming that the total hardness of water is due to CaCO3, how many grams CaCO3 does it correspond to? B) What is the total hardness of the unknown water in ppm CaCO3?