[d1llp1ckle]

Hello!
I am having trouble with this question :

How many grams of Potassium Sodium Tartrate Tetrahydrate (C4H4KNaO6*4H2O) are needed to make 0.75L of a 3% (w/v) aq soultion of sodium tartrate?

I just dont even know where to begin with this question because I am not sure how to factor out the water...
Any help is greatly appreciated!

[fledarmus]

Do you know what physically happens when you put that compound into water?

Could you, for example, write a reaction for the process?

Personally, I was trying to figure out what happens to the potassium...

[d1llp1ckle]

Umm no I have no idea what happens in the reaction or how to write a reaction equation, I think its just the wording of the question I think its supposed to say potassium sodium tartrate, not sodium tartate. Because theres a note on my question sheet that says: Note we want 3% (wv) sodium tartrate, not 3% sodium tartrate tetrahydrate. So I think they just forgot to mention potassium.

[d1llp1ckle]

Question Should Say:

How many grams of Potassium Sodium Tartrate Tetrahydrate (C4H4KNaO6*4H2O) are needed to make 0.75L of a 3% (w/v) aq soultion of potassium sodium tartrate?

[Borek]

If you take 1 gram of the hydrated salt it will NOT contain 1 gram of the potassium sodium tartrate.

Water of crystallization goes into the solution, but in most cases you don't have to worry about it - just dissolve the solid in smaller amount of water then fill up to requested volume.