A problem statement was the following:A dry sample of limestone is completely soluble in H...

A problem statement was the following:

A dry sample of limestone is completely soluble in HCl and contains no Fe or Al. When a 1.000 g sample is ignited, the loss in weight is found to be 0.450 g. Calculate the percent CaCO3 and MgCO3 in the limestone.

The solution was

Answer the following questions:

a. What information in addition to that in the problem statement had to be obtained?

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b. What would a diagram for the process look like?

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c. What was the basis for the problem solution?

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d. What were the known variables in the problem statement, their values, and their units?

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e. What were the unknown variables in the problem statement and their units?

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f. What are the types of material balances that could be made for this problem?

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g. What type(s) of material balance was made for this problem?

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h. What was the degree of freedom for this problem?

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i. Was the solution correct?