Page 83 - Chemistry - XII
P. 83
→
→
→ KFeCN
6
4
KFeCN →
4
6
Pb +H S PbS +2H +
+2
2
B lack ppt.
PbS+ 2HNO Pb NO +H S
3 3 2 2
Black pppt.
Pb NO +H SO PbSO +2HNO
3 2 2 4 4 3
Whiite ppt.
Pb CH COO+ 2KI PbI +2CH COOK
3 2 2 3
Yellow ppt.
Pb CH COO+ KCrO PbCrO + 2CHCOOK
4
2
3
3
4
2
Yellow ppt.
PbCrO+ 2NaOH NaCrO +PbOH
4 2 4 2
Soluble
Cu +H S CuS +2H +
+2
2
Black ppt.
3CuS+8HNO 3CuNO + 2NO+ 4H O+3S
3 3 2 2
Cu NO +2NH OH Cu OH +2NH NO
3 2 4 Blue ppt. 2 4 3
