CHEMISTRY 12 – PREDICTING PRECIPITATE FORMATION WORKSHEET
1) Will a precipitate form when 25.0 mL of 0.15 M AgNO3 is added to 15.0 mL of 0.20 M NaCl?
Support your answer with appropriate calculations. (4 marks)
[ AGNOD
[ NACD
AGNO
}
=
0.15 Mx
0.20 M
=
25.0mL
40.07mi
15.0mL
x
Trial
Agttcl
=
Ksp
=
[
0
'
0.075N
0.075N
.
}
Natta
Nad
0.094N
Agdcs )
oosm
-
tu
Ag++N05
0.094N
0.094 M
0
AGDCCIJ
(0.094×0.075)
7.0×10-30
(1.8×100) : a Ppt forms
Ksp
=
=
Trial
Ksp >
.
D
2) Does a precipitate form when 3.0 mL of 1.0 x 10-3 M NaBr is added to 2.0 mL of 1.0 x 10-3 M
Pb(NO3)2? (4 marks)
[ NaBr]=
1.0×10
'3Mx
3.0mA
=
6.0×10
'm
CPbw03bifl.0xlo3Mx2.qmncT.4.oxl04nB0NaBroNattBr-pbwosbnsPb2tt2N056.0x1o4M6.Oxl04M4.oxo4M4.Ox104MPbBr2cDFpb2tt2Br-0TrialKsp-CPb2tXBrT2-k.0x1o4k6.Ox1092-1.4x1ot0@TrialKsPcKspC6.6x109i.n
oppt
forms
0
3) Will a precipitate form when 90.0 mL of 1.00 x 10-2 M Cu(NO3)2 and 10.0 mL of 1.00 x 10-2 M
NaIO3 are mixed? Explain using appropriate calculations. (4 marks)
4) Will a precipitate form if 30.0 mL of 0.054 M Ca(NO3)2 is mixed with 60.0 mL of 8.1 x 10-4 M
Na2SO4? (4 marks)