One Way of Obtaining Pure Sodium Carbonate Is Through the Decomposition

question 79

Multiple Choice

One way of obtaining pure sodium carbonate is through the decomposition of the mineral trona, Na₅(CO₃) ₂(HCO₃) $\rarr$ 2H₂O, as shown in the following reaction: 2Na₃(CO₃) (HCO₃) $\rarr$ 2H₂O(s) $\rarr$ 3Na₂CO₃(s) + CO₂(g) + 5H₂O(g)
When 15 metric ton (1 *10³ kg) of trona is decomposed, 11 metric ton of Na₂CO₃ is recovered. What is the percent yield of this reaction? (1 metric ton = 10³ kg)

• A)95%
• B)73%
• C)65%
• D)42%
• E)13%

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