Question
An impure sample of CaC2O4 . H2O is analyzed using TGA technique. TG curve of the sample indicates the total mass change from 85 mg to 30.7 mg when this sample was heated up to 1173 K. calculate the purity of the sample.
Answer :
Word Count : 351
Let's calculate the purity of the sample based on the given data. ### Given: - Initial mass of the sample: \( m_0 = 85 \, \text{mg} \) - Final mass of the sample: \( m_f = 30.7 \, \text{mg} \) - Mass loss: \( \Delta m = m_0 - m_f = 85 \, \text{mg} - 30.7 \, \text{mg} = 54.3 \, \text{mg} \) - Decomposition reaction of calcium oxalate monohydrate (\( \text{CaC}_2\text{O}_4 \cdot \text{H}_2\text{O} \)) is: \[ \text{CaC}_2\text{O}_4 \cdot \text{H}_2\text{O} \rightarrow \text{CaO} + 2 \text{CO}_2 + \text{H}_2\text{O} _______ ______ ______ ____ _________ ______ _________ ______ ___ ________ ________.
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Let's calculate the purity of the sample based on the given data. ### Given: - Initial mass of the sample: \( m_0 = 85 \, \text{mg} \) - Final mass of the sample: \( m_f = 30.7 \, \text{mg} \) - Mass loss: \( \Delta m = m_0 - m_f = 85 \, \text{mg} - 30.7 \, \text{mg} = 54.3 \, \text{mg} \) - Decomposition reaction of calcium oxalate monohydrate (\( \text{CaC}_2\text{O}_4 \cdot \text{H}_2\text{O} \)) is: \[ \text{CaC}_2\text{O}_4 \cdot \text{H}_2\text{O} \rightarrow \text{CaO} + 2 \text{CO}_2 + \text{H}_2\text{O} _______ ______ ______ ____ _________ ______ _________ ______ ___ ________ ________.
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