Gravimetric Analysis of AgNO3 A student attempts to determine the correct equation to describe the thermal decomposition reaction of AgNO3. Heating 4.7885 g of AgNO3 (i.e. about 5 g) gave 3.0406 g of residue. The following three equations have been determined as the most likely possibilities: 1. 2 AgNO3(s) → 2 AgNO2(s) + O2(g) 2. 2 AgNO3(s) → 2 Ag(s) + 2 NO2(g) + O2(g) -> 3. 4 AgNO3(s) → 2 Ag2O(s) + 4 NO2(g) + O2(g) -> sito ince fill out fornill, bubora bilo to Using the data provided and the stoichiometry of the above equations, determine which of the equations correctly describes the thermal decomposition of AgNO3. If Initial mass of AgNO3 = 4.7885 g Initial number of moles of AgNO3 = .02819mol - Table 1. Calculation of % Discrepancy Possible Percent Expected #moles Expected mass (g) residueat pitone (theoretical) open cidi (theoretical) osals Discrepancy bus codesup olve or benisido If AgNO₂ Giste abiz all to If Ag 2

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Gravimetric Analysis of AgNO3
A student attempts to determine the correct equation to describe the thermal decomposition
reaction of AgNO3. Heating 4.7885 g of AgNO3 (i.e. about 5 g) gave 3.0406 g of residue. The
following three equations have been determined as the most likely possibilities:
dista ifree eli suhoa bil..
Using the data provided and the stoichiometry of the above equations, determine which of the
equations correctly describes the thermal decomposition of AgNO3.
1. 2 AgNO3(s) → 2 AgNO2(s) + O2(g)
2. 2 AgNO3(s) → 2 Ag(s) + 2 NO2(g) + O2(g)
3. 4 AgNO3(s) → 2 Ag2O(s) + 4 NO2(g) + O2(g)
If AgNO₂
If Ag
If Ag₂0
Table 1. Calculation of % Discrepancy
Possible
Expected #moles
Expected mass (g)
Percent
residuettone (theoretical) nonoscidi (theoretical) osoals Discrepancy
uste oblast on to aaam istnomsqs stil bes nouzsup erolvórg sal or bepistdo
1.
Initial mass of AgNO3
4.7885 g
Initial number of moles of AgNO3 = .02819mol
2.
your979216
IositoreenT
Calculations. Show all calculations, formulae and units below; give your final answers to the
appropriate number of significant figures and place in chart above.
=
Molar mass of AgNO3.
M= (1x 107.87) + (1x 14.01) + (3x 16.00)
= 169.88g/mol
Moles of AgNO3.
n = m
M
qka fe ad as solit tegut al anc
n = 4.7885g
169.88 g/mol
= 0.02819 mol
noitzu
Transcribed Image Text:Gravimetric Analysis of AgNO3 A student attempts to determine the correct equation to describe the thermal decomposition reaction of AgNO3. Heating 4.7885 g of AgNO3 (i.e. about 5 g) gave 3.0406 g of residue. The following three equations have been determined as the most likely possibilities: dista ifree eli suhoa bil.. Using the data provided and the stoichiometry of the above equations, determine which of the equations correctly describes the thermal decomposition of AgNO3. 1. 2 AgNO3(s) → 2 AgNO2(s) + O2(g) 2. 2 AgNO3(s) → 2 Ag(s) + 2 NO2(g) + O2(g) 3. 4 AgNO3(s) → 2 Ag2O(s) + 4 NO2(g) + O2(g) If AgNO₂ If Ag If Ag₂0 Table 1. Calculation of % Discrepancy Possible Expected #moles Expected mass (g) Percent residuettone (theoretical) nonoscidi (theoretical) osoals Discrepancy uste oblast on to aaam istnomsqs stil bes nouzsup erolvórg sal or bepistdo 1. Initial mass of AgNO3 4.7885 g Initial number of moles of AgNO3 = .02819mol 2. your979216 IositoreenT Calculations. Show all calculations, formulae and units below; give your final answers to the appropriate number of significant figures and place in chart above. = Molar mass of AgNO3. M= (1x 107.87) + (1x 14.01) + (3x 16.00) = 169.88g/mol Moles of AgNO3. n = m M qka fe ad as solit tegut al anc n = 4.7885g 169.88 g/mol = 0.02819 mol noitzu
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