Question

IV bags are commonly prepared using hydrated salts. Calcium chloride is commonly a dihydrated salt, and magnesium sulfate is commonly a hexahydrated salt. Match each hydrated salt with its correct molar mass.

A Neither hydrated salt
B Magnesium Sulfate Hexahydrate
C Calcium Chloride Dihydrate

228.46 g/mol
120.37 g/mol
110.98 g/mol
147.01 g/mol
75.53 g/mol
104.37 g/mol

I put 228.46 g/mol as B, 147.01 g/mol as C, and everything else as A but it was incorrect. Please help

Answer 1

I think the answer sheet is wrong UNLESS----
How accurate does the prof want you to be? Using the numbers on my periodic chart I agree with your answer; however, my periodic table is about 20 year old, maybe older, so it could be off in the decimal portion by one or two digits but no more than that I wouldn't think. I Googled molar mass Calcium chloride dihydrate and it came back 147.01. I don't know what numbers they used to calculate that. I typed in the same for magnesium sulfate hexahydrate and it gave me instead Magnesium sulfate. I tried with magnesium sulfate heptahydrate with the same result. So I took the number they gave me for anhydrous magnesium sulfate and added 6*[18.015] to get 228.456 which I would round to 228.46 without blinking. Again, with Google, we don't know what individual values they are using nor how accurate the answer sheet want us to be. Personally, I go with the answer sheet being faulty. Let me know how things turn out. Another thought: When I Googled magnesium sulfate hexahydrate (and heptahydrate) it returned the molar mass for anhydrous magnesium sulfate of 120.366. I quickly knew that wasn't correct so I checked it out. The prof may have been in a hudrry and didn't realize that 120.366 wasn't even close. Good luck.