Question

precipitation and moles help?:

Answer 1

After 8ml of phosphate addition the height becomes costant this implies that all the metal nitrate added can be reacted by adding 8ml of phosphate.
now millimoles of phosphate=8.
Millimoles of nitrate=12.
3T(NO3)x + x Na3(PO4)-> T3 (PO4)x +3x NaNO3
12 8
3/x=12/8.
3/x=3/2.
x=2,
So the formula is T (NO3)2