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### Topic: help with zinc sulfate  (Read 1621 times)

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#### angyc

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##### help with zinc sulfate
« on: October 31, 2015, 10:00:43 PM »
I need to make a mineral mix for horses which requires 462g of zinc sulfate monohydrate. I can only source z.s. heptahydrate. Z.s.m is 35% whilst z.s.h is 22%. Can someone do the maths for me to give me the correct amount of z.s.h I need to use?? Many thanks.

#### Borek

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##### Re: help with zinc sulfate
« Reply #1 on: November 01, 2015, 03:03:32 AM »
In both cases you need exactly the same number of moles of Zn. What is the molar mass of ZnSO4·H2O? How many moles of the salt in the 462 g of the solid? What is the molar mass of ZnSO4·7H2O? What is the mass of the same number of moles of the salt?
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#### Enthalpy

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##### Re: help with zinc sulfate
« Reply #2 on: November 01, 2015, 08:08:22 PM »
A table of the elements' mass is there
https://en.wikipedia.org/wiki/Relative_atomic_mass
it goes like: count the atoms in the molecules, add the masses.