An impure sample of CaC2O4H2O is analysed 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 upto 1173 K. calculate the purity of the sample.
To calculate the purity of the sample of CaC2O4H2O, we can use the information provided in the TG (Thermogravimetric) curve. TG is a technique that measures the change in mass of a sample as it is heated, which can be used to determine the composition of the sample.
Here's how you can calculate the purity of the sample:
1. Determine the initial mass (Mi) of the sample:
Mi = 85 mg
2. Determine the final mass (Mf) of the sample after heating:
Mf = 30.7 mg
3. Calculate the mass loss (ΔM) during the heating process:
ΔM = Mi - Mf
ΔM = 85 mg - 30.7 mg
ΔM = 54.3 mg
4. Now, we need to determine the theoretical mass loss for pure CaC2O4H2O. This involves calculating the stoichiometric mass loss based on the chemical composition of the compound. The formula
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