[DelquesOtaku]

What mass of Ca2+ could be removed from hard water by a 2000.0 gram sample of hydrated zeolite which is Na2Al2Si3O10 x 2H2O?

 

[macman104]

You need a reaction between Ca2+ and the hydrated zeolite.  I'm not sure what that reaction is, do you get any information in your book about this?

[DelquesOtaku]

I mean sorry Ca2+ reacts with hard water but i don't know the Elements that Form Hardwater.

[mr cool]

I mean sorry Ca2+ reacts with hard water but i don't know the Elements that Form Hardwater.

i think it is calcium and magnesium

[DelquesOtaku]

But i need to know if its CaMg or Ca2Mg2...?

[macman104]

Sorry, but reezyfbaby, you are incorrect.  And Delques, hard water is water that contains a lot of ions, like calcium.  The question is telling you that hydrated zeolite removes Ca2+ ions from the hard water, this makes it softer.  You need a reaction between the Ca2+ and the hydrated zeolite to answer this question.

[mr cool]

Sorry, but reezyfbaby, you are incorrect.  And Delques, hard water is water that contains a lot of ions, like calcium.  The question is telling you that hydrated zeolite removes Ca2+ ions from the hard water, this makes it softer.  You need a reaction between the Ca2+ and the hydrated zeolite to answer this question.

not according to google 

[macman104]

Sorry, I guess I read Delques's response in your post, and just read yours as wrong too, for whatever reason.

[DelquesOtaku]

So What u saying is that i have the equation like this?

Ca2 + Na2Al2Si3O10 x 2H2O    something something

[macman104]

Right, and from there you can calculate the moles of your zeolite, and determine how many moles of Ca2+ can be removed, and then the mass.

[DelquesOtaku]

Sorry but i still don't understand the something something part...

[DelquesOtaku]

Excuse me Can you confirm if Calcuim Sulfate is Hard water?
Because i know it should be Ca(SO4) that should be the formula for hard water...i think is it?

[Borek]

There is no "formula" for hard water.

Hard water is water with dissolved calcium and/or magnesium salts. That means it contains Mg²⁺ and/or Ca²⁺ ions.

[DelquesOtaku]

So which one do i use Mg or Ca...? thats what confused me it said Ca2+ in the question.
so i think its Ca but im not sure.

[DelquesOtaku]

Okay I made a big mistake This is the right equation im supposed to use:

Ca2+ (aq) +  2NaZ (cr)     CaZ2 (cr)  + 2Na+ (aq)   

Substitute Z  with Na2Al2Si3O10 x 2H20  because its asking to use the hydrated zeolite.

and im trying to find the mass of Ca2+....now its understandable But i don't know what to do next i keep on coming up with answers like this:

Ca2 + 2Na3Al2Si3O10 x 2H2O --->  CaNa2Al2Si3O10 x  2H2O + 2Na 

But i know its not right because it doesn't make sense.