Problemas Equilibrio de Precipitación

Equilibrio de precipitación �� L�� :

I�� : 6.5�10 �8; I�� : 8.3�10 �17; I�� : 7.1�10 �9; I�� : 4.7�10�17 O�� : ��

��; �� N�I 0.1 M; �� 0.010 M ��

�� ) P�I2 >T�I > B�I 3 > A�I; �� P�I2 >T�I > B�I 3 > A�I ; �� P�I2 > B�I 3 >T�I > A�I

�� S� �� M�

2+

3+

� F� �� , ��

�� . S�� 0.10 M, ��: �� E� �� H �� E� % �� H = 10.0 ��: D��: �� (M�(OH)2) = 1.8.10 �11; �� (F�(OH)3) = 4.0.10 �38 �� 2.87 < �H < 9.13; �� 98.20% � 100%

2+

2+

�� S� �� F� �� , ��

��. S�� 0.010 M � �� H 2S, ��: �� E� �� H �� E� % �� H = 3.5 ��

�23

�� (��S) = 1.6 ⋅10

�� (F�S) = 6.0 10

�18

[S2�] [ H+ ] 2 = 1.1 10 �22

�� 2.08 � 3.37; �� 100%, 45.53%

�.� C�� H � ��

�� 0.25 M �� M�(NO3)2 � 0.5 M �� NH 3. +

D��: �� (M�(OH)2) = 10.4; �� (NH4 ) =9.37 �� 9.10; 0.93 M �.� C�� A�C� �� NH 3 �� .

�Q�� A�C� �� 1� �� NH 3 1M? �� ksp (AgCl) = 1.82.10 -10; �� β2= 7.1 �: 6.86 �� 1

�3

�.� S� �� F�(NO 3)3 10 M � �H = 5.0.

�. I�� F�(OH) 3? 3+

�. S� �� F� �� , F�F 3. S� �� , N�F, � �� H = 5.0? �.

�C�� ?

�� K�� = 12.59�10

�39

β3(F�F3) = 7.94

N� �� 4.64�10 �2; �� 4.94�10 �2

�� S� �� 0.5 � �� P�I 2(�) �2

�� 100 �� 10 M �� KI? �� C�� KCN �� P�I 2? (��

�� CN �) ��K��(P�I2�) = 6.7.10�9; �4 (P�(CN)42�) = 1.0.10 10 �� 3.089; �� 0.4095 �

�� ) �� 100 �L �� ; �) �� 100 �L ��

�� 0.05 M. C�� , �� . D��: �� (B�SO4) = 9.2; P�� (B�SO4) = 233.34 �4

�6

�� ) 5.86 ·10 � (�) 2.94·10 �

2+

�� 100 �L �� 0.5 M �� , �� .

�C��

2+

�� ?

D��: �� (��S) = 23.8; (H2S/HS� /S2� ): ��1=6.9, �� 2=12.6; HA�, ��=4.7; P�� . �� = 65.4 R: 3.27�10�8� �� C�� A�I �� 1.0 M? C�� +

�� A�(NH 3)2

D��: �� (A�I) = 15.83; �� β2 (A�(NH 3)2+) = 7.4; P�� (A�I) = 234.8 R: 1.43�10�2�

�� A 2.00 �� B�SO 4 �� 500 �L �� EDTA 0.08 M � �H 10.

C�� . D��: �� (B�SO4) = 9.2; �� β′B��2� (� �H = 10)= 7.3;

2+

�2

�� 10 M. C�� H ��:

�) �� (OH) 2 �) ��

2+ 2�

�) �� (OH) 4 �14

2�

D��: �� (��(OH)2 )= 15.3; � � = 10 ; �� β 4 (��(OH)4 )= 15.5 �� ) 7.35; �) 8.9; �) 12.9

�� C�� :

�) A�2CO3 �� ; �) C�F2 �� N�F 0.1 M; �) F�S �� H 2S (0.10 M). D��: �� (A�2CO3) = 10.4; �� (C�F2) = 9.8; ��(F�S) =23.8 �

�

�2

��(HF/F ) =3.05; (H 2S/HS / S ): ��1=6.9, �� 2=12.6 �4

�� ) 2.37 ·10 M; �) 10

�7.8

�12

M; �) 6.3·10

M �3

�� H 4.00 �� L�(NO3)3 1.00�10 M � EDTA �� 1.01�10

�3

M. �) C�� L�(III) �� EDTA. �3

�) S� � �� (K 2O�) �� 1.00�10 M, �� H, �� L�(III) �� . D��: �� L��

2�

�

�� β� = 6.8 (� �H=4)

H2O�/HO� /O� ��1 = 1.1; �� 2 = 4.0

L�2O�3 (�) �� = 27.7

Problemas Equilibrio de Precipitación

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