[pinkster101]

In my chemistry lab yesterday we titrated Me₄NI₅ with sodium thiosulphate. The sodium thiosulphate was in the buret, and 24mL ethanol was added to the Me₄NI₅ in the flask . In one of the titrations, i calculated that 0.00132 moles of sodium thiosulphate was added. Now I have to determine how many moles of Me₄NI₅ thia implies, and i am getting confused.

I have these two equations in my lab book:
        (1)   2S₂O₃ + I₂ ----> S₄O₆ + 2I

and   (2)  Me₄NI + 2I₂----> Me₄NI₅

The second equation was from when the Me₄NI₅ was made.

I no that I₅ in the Me₄NI₅ acts like I^- and 2 moles of I₂

I am sorry if this is confusing. I am just not sure how to figure out how many moles of Me₄NI₅ are implied  by 0.00132 moles of sodium thiosulphate. I think it has something to do with a mole ratio...but i have no clue what that mole ratio would be.

Thanks for the *delete me*

[AWK]

Hint
Me4NI5 +  4S2O3 =  Me4NI +  2S4O6 + 4I

[pinkster101]

ok thanks so that means for every 4 moles of sodium thiosulphate, one mole of tetramethylammonium pentaiodide is suggested, therefore, i would divide the moles of sodium thiosulphate by four to get implied moles of tetramethyammonium iodide right?

[AWK]

Exactly