Potatoes contain 18% starch. Find the mass of starch, which was obtained from 700 kg
| May 26, 2021 | education
Potatoes contain 18% starch. Find the mass of starch, which was obtained from 700 kg of potatoes, if the yield is 93%.
Given:
ω (starch) = 18%
m (potatoes) = 700 kg = 700000 g
ω out. = 93%
To find:
m pract. (starch) -?
Decision:
1) Calculate the mass of starch contained in potatoes:
m theor. (starch) = ω (starch) * m (potato) / 100% = 18% * 700,000 / 100% = 126,000 g;
2) Calculate the mass of starch that can be obtained practically from potatoes:
m pract. (starch) = ω out. * m theor. (starch) / 100% = 93% * 126,000 / 100% = 117,180 g = 117.18 kg.
Answer: The mass of starch is 117,180 g (117.18 kg).
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