Error in chemistry is defined as the difference between the true result and the measured result. In…

a) 0.01547 1) For the following sets of data 0.1065, 0,1991, 0.1016, and 0.1018. The Standard deviation is: - b) 02145 c) 0.01125 d) 0.048064 *-the 95% confidence interval, and the relative standard deviation for this data set. 1-3.182 for 3 degree of freedom of 95% confidence. a. 0.127±0.076 b. 0.127 +0.0301 d. 0.127 +0.002 c-0.127 +0.02 2)) what is the molar concentration of Fe" ions of 10.42% (w/w) Fe(NO) (MW 241.86 g/mol) solution has a density of 1.059 g/ml. 7 a- 0.28 M b- 0.46 M c-1.37 M c- 0.52 M 3) A 3..23 g sample of impure lead nitrate was analyzed by gravimetric analysis to determine the percentage of lead by mass present. Sodium sulphate was delivered from a burette to precipitate the lead ions as lead sulphate. The precipitate was filtered, washed, and dried before been weighed. When weighed, the precipitate had a mass of 1.44 g. the mass percent of Pb in impure sample is Pb(NO3)2 + Na:SO PbSO4-2NaNO (fw for PbSO4 303.26 g/mol and Atomic mass for 'pb 207.2 g/mol) a-60.59% b-44.27% c-80.71% d- 30,46 % 4) the pH for the solution that result from mixing of 50 ml 0.020 M in HC1 and 100 ml of 0.010 M in Nac a- 2.87 b-1.18 c-2.17 d-1.88 5) How many ml of HNO, needed from a bottle of concentrated aqueous nitric acid, labeled (63.0 w/w% HNO... The density is 1.3 g/ml and (FW of HNO, is 63.01 g/mol) to prepare 100 ml of 1 M of the acid ? a. 6.25 ml b. 5.18 ml 6) systematic error can be corrected by: c. 3.48 ml d. 7.70 ml a-calibration b- statistical calculations c-relative error determination d- bias 7) The mass of AgNO,(s)( Fw 1-69.87g/mol) needed to prepare 0.5 L of 0.0500 M AgNO, (169.87 g/mol) solution from the primary-standard-grade solid is a) 18.548g b) 16.987 g c) 16.139 g d) 4.24 g. e. 2.12 ml E) The ppm concentration of K ions (Atomic mass is 39.04 g/mol) in the solution that result from dding 20 ml of 0.1 M KNO, to 15.0 ml of 0.3 M KCI? - 2230.85 ppm b-3214.2 ppm c-7250.2 ppm d- 2535.4 ppm 5543 grams of Na,CO, (MW-105.9 g/mole) are placed in a 500.0 mL volumetric flask. A 25.00 aliquot of this solution is neutralized with 17.55 ml. of HC1. What is the molarity of the HCI tion (show your work)?

a) 0.01547 1) For the following sets of data 0.1065, 0,1991, 0.1016, and 0.1018. The Standard deviation is: - b) 02145 c) 0.01125 d) 0.048064 *-the 95% confidence interval, and the relative standard deviation for this data set. 1-3.182 for 3 degree of freedom of 95% confidence. a. 0.127±0.076 b. 0.127 +0.0301 d. 0.127 +0.002 c-0.127 +0.02 2)) what is the molar concentration of Fe" ions of 10.42% (w/w) Fe(NO) (MW 241.86 g/mol) solution has a density of 1.059 g/ml. 7 a- 0.28 M b- 0.46 M c-1.37 M c- 0.52 M 3) A 3..23 g sample of impure lead nitrate was analyzed by gravimetric analysis to determine the percentage of lead by mass present. Sodium sulphate was delivered from a burette to precipitate the lead ions as lead sulphate. The precipitate was filtered, washed, and dried before been weighed. When weighed, the precipitate had a mass of 1.44 g. the mass percent of Pb in impure sample is Pb(NO3)2 + Na:SO PbSO4-2NaNO (fw for PbSO4 303.26 g/mol and Atomic mass for 'pb 207.2 g/mol) a-60.59% b-44.27% c-80.71% d- 30,46 % 4) the pH for the solution that result from mixing of 50 ml 0.020 M in HC1 and 100 ml of 0.010 M in Nac a- 2.87 b-1.18 c-2.17 d-1.88 5) How many ml of HNO, needed from a bottle of concentrated aqueous nitric acid, labeled (63.0 w/w% HNO... The density is 1.3 g/ml and (FW of HNO, is 63.01 g/mol) to prepare 100 ml of 1 M of the acid ? a. 6.25 ml b. 5.18 ml 6) systematic error can be corrected by: c. 3.48 ml d. 7.70 ml a-calibration b- statistical calculations c-relative error determination d- bias 7) The mass of AgNO,(s)( Fw 1-69.87g/mol) needed to prepare 0.5 L of 0.0500 M AgNO, (169.87 g/mol) solution from the primary-standard-grade solid is a) 18.548g b) 16.987 g c) 16.139 g d) 4.24 g. e. 2.12 ml E) The ppm concentration of K ions (Atomic mass is 39.04 g/mol) in the solution that result from dding 20 ml of 0.1 M KNO, to 15.0 ml of 0.3 M KCI? - 2230.85 ppm b-3214.2 ppm c-7250.2 ppm d- 2535.4 ppm 5543 grams of Na,CO, (MW-105.9 g/mole) are placed in a 500.0 mL volumetric flask. A 25.00 aliquot of this solution is neutralized with 17.55 ml. of HC1. What is the molarity of the HCI tion (show your work)?

Introductory Chemistry: A Foundation

8th Edition

ISBN:9781285199030

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter2: Measurements And Calculations

Section: Chapter Questions

Problem 104AP: Convert 45 mi/h to m/s, showing how the units cancel appropriately.

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