Post lab questions: 1. If the precipitate in this experiment was not completely dried at the end of the experiment, how would that have affected your calculations of the mass percentage? 2. In this experiment we are assuming that all of the arsenic in the soil sample reacts. If we added more than 20 mL of AgNO3, would that have affected your calculations? Please explain.

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Chapter19: The Chemistry Of The Main-group Elements
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Chemistry HW. How to answer question 1 and 2?
A full report is required for this lab
Post lab questions:
1. If the precipitate in this experiment was not completely dried at the end of the
experiment, how would that have affected your calculations of the mass percentage?
2. In this experiment we are assuming that all of the arsenic in the soil sample reacts. If we
added more than 20 mL of AGNO3, would that have affected your calculations? Please
explain.
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Transcribed Image Text:A full report is required for this lab Post lab questions: 1. If the precipitate in this experiment was not completely dried at the end of the experiment, how would that have affected your calculations of the mass percentage? 2. In this experiment we are assuming that all of the arsenic in the soil sample reacts. If we added more than 20 mL of AGNO3, would that have affected your calculations? Please explain. Z151jofga koalc203c 2I1491zduiybeejapytly1ijpng 4igvijozang a.png nash- ng ng
AsO43+3 Ag+=> AgaAsO4 ()
The arsenate is converted into a solid (Ag3AsO4 (s)). If the mass of solid produced is known, we
can calculate the mass percent of arsenic in the 1.00 kg soil sample.
Soil Sample 1
Volume of soil
Volume of 1 M
Mass of Ag3AsO4 (g)
Mass % of As in Soil
Sample (mL)
AGNO: (mL)
Sample
100.00
20.00
0.370024 g
0.006%
50.00
20.00
0.185012 g
0.003%
Soil Sample 2
Mass of Ag3AsO4 (g) Mass % of As in Soil
Sample
Volume of soil
Volume of 1 M
Sample (mL)
AGNO3 (mL)
20.00
0.231265 g
0.00375%
100.00
20.00
0.115633 g
0.001875%
50.00
Transcribed Image Text:AsO43+3 Ag+=> AgaAsO4 () The arsenate is converted into a solid (Ag3AsO4 (s)). If the mass of solid produced is known, we can calculate the mass percent of arsenic in the 1.00 kg soil sample. Soil Sample 1 Volume of soil Volume of 1 M Mass of Ag3AsO4 (g) Mass % of As in Soil Sample (mL) AGNO: (mL) Sample 100.00 20.00 0.370024 g 0.006% 50.00 20.00 0.185012 g 0.003% Soil Sample 2 Mass of Ag3AsO4 (g) Mass % of As in Soil Sample Volume of soil Volume of 1 M Sample (mL) AGNO3 (mL) 20.00 0.231265 g 0.00375% 100.00 20.00 0.115633 g 0.001875% 50.00
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