Question

need help with b and c

JUHU GREI eacn addition in Data Table 1. Mass of AgzAsO4, 8 Data Table 1. Gravimetric Analysis of AgzAsO4 precipitate Aliquot Total volume 1 M Total volume in AgNO3 added, mL Na3AsO, flask, mL Initial 0.1L/100 ml 0.0 10.5 1.0 1.5 2.0 2.5 3 .0 160. 51 mL 101.02 101.53 102.05 102.56 103.07 103.57 I 104.07 0.0770847 0.154173 0.231261 0.308348 0.385435 0.462463 0.462530 0.462530 4.0

Answer 1

WKI DAY 12-253 Answer: data given : From the As Oy (aq) + 3 Ag Car) it Ag, As Oy (3) is clear that for precipitation of a mole ions, of Arsenate 3 motes of AgNO₃ are equired. According to tabulas data given we will calculate . following concentrations : b. Final mass of Ag, As ou obtained = 0.462530g we know, Mol, wt. of Ag, AsOy = 462.53da gswali Thus, final moles of Ag₂ AsOy obtaimed are = 0.4625309 TUESDAY 462.53 g/mal 1 = 0.001 moles of " Ag₂ AsOy is for Now that at final mass assuming of whole amount of 2 the whole of precipitation WK17 DAY 113-252 "EETINGS / APPOINTMENTS 12 present in Na, Aso soil. . - 0.12 So then moles of Ag3 AsOy = moles of Na, Aso. 2. moles of Nag Asoy = 0,001 moks.. Total volo of solution in original flask = in in concentration Hence moles moles per lite . per lite will be - 0,ool moles 0.1 lite [ 0.1 moles flitze

WR 1 DAY 116-249 c.) Concentration of excess reactant CAG NO). - Total volume of GM Agno, solution added = 18ml Hence, moles of Agno added during analysis = Melanity X volume of solution added in libes. = 1 moles x 0.018 lites libe = 0.018 moles on it is clear SATURDAY 2 WK 17 DAY 117-248 MEETINGS / APPOINTMEN - As paevious Calculation, we obtained final moles of Ag, AsOy I after final analysis = 0.001 moles. From precipitation reaction it is clear CAT WEETINGS / APPOINTMENTS that for each more of Agz A80WKIZDAY 17248 3 moles of Ag No were equired 10 i.e. moles of Ag No3 reacted - 3x 0.001 moles 3 or required = 0.00 males. 12 moles of est unsacted AgNO3 left = Total moles of Ag No added - moles of Ag Noz Hacted = 0,018 - 0.003 - on 015 moles unseanted. final solution - 104.07ml Henet, Total volo of will be = 0, 015 moles SUNDAY 28 0.10407 slites - 0. 14413 376 moles/lite. mence concentration