One Way of Obtaining Pure Sodium Carbonate Is Through the Decomposition

question 122

Multiple Choice

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

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

---

Definitions:

Sensorimotor

Refers to the developmental stage in early childhood where infants learn about their environment and themselves through sensory experiences and motor activities.

Cognitive Processing Therapy

A cognitive-behavioral therapeutic approach designed to help individuals process and overcome trauma-related thoughts and emotions, commonly used to treat PTSD.

Prolonged Exposure Therapy

A psychological intervention designed to help individuals confront their fears and reduce symptoms of PTSD through repeated, controlled exposure to the traumatic memories.

Cognitive Behavioral Therapy

A psychotherapeutic approach that addresses dysfunctional emotions and behaviors through goal-oriented, systematic procedures.