The mass fraction of iodine in the pharmacy iodine tincture is 5%.
| September 29, 2021 | education
The mass fraction of iodine in the pharmacy iodine tincture is 5%. What mass of iodine and alcohol should be taken to prepare 200 g of tincture?
Given:
w (I₂) = 5%
m (p-pa) = 200g
Find:
m (I₂), m (alcohol)
solution:
m (I₂) = w (I₂) * m (p-pa) = 0.05 * 200 = 10g
m (alcohol) = m (p-pa) – m (I₂) = 200-10 = 190g
Answer: m (I₂) = 10g, m (H₂O) = 190g
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