please i need help in chem

[shawkat]

can any one solve june 2009 q 5 b please

 

[XPFMember]

i will ell u abt the first variant,only values different in both variants!
first see what is the total vol.of phosphate sol. required for 12 cm3 sol. of metal T nitrate,i.e. the vol. when the height is max. and graph is horizontal line!so 12cm3 metal T nitrate solution requires 8cm3 phosphate solution!
now find the ratio TO4 =>12:8=>3:2,so 3 ions of T needs 2 of phosphate ,thus the formula will be T3(PO4)2
hope this helps!

 

[shawkat]

thanx