The barium ion is toxic to humans. However, barium sulfate is commonly used as an image enhancer for gastrointestinal x-rays. What does this imply about the position of the equilibrium shown below? BaSO4 Ba+2 + SO4-2?
Answers
It implies that the position of equilibrium lies far to the left.
Explanation:
The dose of barium ion must be about 200 mg/(kg·day) to see adverse effects.
For a 50 kg individual, this corresponds to 10 g/day of barium.
Barium sulfate is highly insoluble in water.
BaSO
4
(s)
⇌
Ba
2+
(aq)
+
SO
2-
4
(aq)
K
sp
=
1.1
×
10
-10
This corresponds to a molar concentration of
1.0
×
10
-5
l
mol/L Ba
2+
or
1.4 mg Ba/L
.
An individual would have to ingest about 7000 L of saturated
BaSO
4
solution to reach this level.
Few individuals have stomachs that are resilient enough to hold this volume.
Thus, it is quite safe to ingest barium sulfate for gastrointestinal X-rays.
I HOPE THIS HELPS YOU
It signalizes that the equilibrium's position lies far to the left.
- The barium ions dose should be about 200 mg(kg. day) to watch the adverse effect. For a single person of about 50 kg, this concurs to 10 g per day of barium.
- In water, barium sulfate is highly insoluble. ⇄
- This concurs with a molar concentration of and . A single person must have ingested a minimum of 7000 L of the solution of saturated to complete the level. Some people have stomachs that are flexible enough to tolerate this volume. So now, it is safe to ingest barium sulfate for gastrointestinal X-rays.
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