its oct/nov08/32 this time... help...?

[eva 21]

(i hate titration...)

neway...
could any1 plz xplain the last part of Q1c)?
how do i get the conc....?

i'd realy appreciate it...
thanks!

 

[eva 21]

and in Q2f)...
ok, i kno that barium forms an insoluble ppt with sulfate...
but how dose that affect the experiment in determining the Mr of metal carbonates?
:geek:

(help!)

(and thanks in advance!)