Problem: Calculate the molar mass of ALUM, KAl(SO 4) 2 . 12H2O or potassium aluminum sulfate dodecahydrate. Be sure to include the twelve waters of hydration in the molar mass.

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We’re being asked to calculate the molar mass of ALUM, KAl(SO4)212H2O or potassium aluminum sulfate dodecahydrate


We can calculate the molar mass of a molecule by doing the following steps:

Step 1: Determine the atomic mass of each element in the molecule based on the Periodic Table of elements 

Step 2: Calculate the molar mass by taking the sum of the atomic mass multiplied by the subscript of each element in the molecule

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Problem Details

Calculate the molar mass of ALUM, KAl(SO 412H2O or potassium aluminum sulfate dodecahydrate. Be sure to include the twelve waters of hydration in the molar mass.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Calculating Molar Mass concept. You can view video lessons to learn Calculating Molar Mass. Or if you need more Calculating Molar Mass practice, you can also practice Calculating Molar Mass practice problems.

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Based on our data, we think this problem is relevant for Professor Opotowsky's class at CPP.