Chemical Forums

General Forums => Generic Discussion => Topic started by: angyc on October 31, 2015, 10:00:43 PM

Title: help with zinc sulfate
Post by: angyc 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.
Title: Re: help with zinc sulfate
Post by: Borek 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?
Title: Re: help with zinc sulfate
Post by: Enthalpy 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.