Question E9

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Question E9

Postby MMckinney_4H » Thu Oct 10, 2019 9:46 am

How am I supposed to figure out the molecular formula for Epsom salt with just knowing its name is Magnesium Sulfate Heptahydrate?

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Re: Question E9

Postby NRobbins_1K » Thu Oct 10, 2019 9:59 am

You can simply look it up, but the naming conventions are useful to memorize. "Sulfate" represents the ion SO4 which has a 2- charge. Since Magnesium has a charge of 2+, it pairs 1:1 with a sulfate ion, so the formula for magnesium sulfate is MgSO4. "Hydrate" indicates a water molecule surrounding an ion in an aqueous environment and "hepta" is the prefix for seven, so "heptahydrate" indicates seven water molecules. Putting this together, 'magnesium sulfate heptahydrate' indicates MgSO4 7H2O.

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Re: Question E9

Postby 005388369 » Thu Oct 10, 2019 10:56 am

All of this is covered in fundamental D which is about nomenclature.

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Re: Question E9

Postby Veronica_Lubera_2A » Thu Oct 10, 2019 11:12 am

Also within the next few weeks, we will cover nomenclature in class where we will learn all of the rules.

Ashley Kumar 3F
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Re: Question E9

Postby Ashley Kumar 3F » Thu Oct 10, 2019 11:45 am

You should probably learn basic names like sulfate which is SO4 because it comes up pretty often.

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