Calculate the mass of the precipitate that will precipitate when an excess of potassium carbonate interacts with
April 25, 2021 | education
| Calculate the mass of the precipitate that will precipitate when an excess of potassium carbonate interacts with 17.4 g of a solution of barium nitrate with a mass fraction of the latter of 15%
Given:
m solution (Ba (NO3) 2) = 17.4 g
ω (Ba (NO3) 2) = 15%
To find:
m (draft) -?
1) K2CO3 + Ba (NO3) 2 => 2KNO3 + BaCO3 ↓;
2) m (Ba (NO3) 2) = ω * m solution / 100% = 15% * 17.4 / 100% = 2.61 g;
3) n (Ba (NO3) 2) = m / M = 2.61 / 261 = 0.01 mol;
4) n (BaCO3) = n (Ba (NO3) 2) = 0.01 mol;
5) m (BaCO3) = n * M = 0.01 * 197 = 1.97 g.
Answer: The mass of BaCO3 is 1.97 g.
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