Answered: Image /qna-images/answer/eb7b3d68-1836-4084-ac94-ef837c25f27d.jpg

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) 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 aliquot of this solution is neutrali tion ( e. 2.12 ml 500