For the cell \[Pt|{{H}_{2}}(g)|\] solution \[X||KCI\] (saturated) \[|H{{g}_{2}}C{{l}_{2}}|Hg|\,Pt\] the observed EMF at \[25{}^\circ C\] was \[600\text{ }mV.\] When solution X was replaced by a standard phosphate buffer with \[pH=7.00,\] the EMF was \[777\text{ }mV\]. Find the pH of solution X.

For the cell \[Pt|{{H}_{2}}(g)|\] solution \[X||KCI\] (saturated) \[|H

1.	For the cell \[Pt\|{{H}_{2}}(g)\|\] solution \[X\|\|KCI\] (saturated) \[\|H{{g}_{2}}C{{l}_{2}}\|Hg\|\,Pt\] the observed EMF at \[25{}^\circ C\] was \[600\text{ }mV.\] When solution X was replaced by a standard phosphate buffer with \[pH=7.00,\] the EMF was \[777\text{ }mV\]. Find the pH of solution X.
A.	3
B.	4
C.	5
D.	6
Answer» C. 5

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For the cell \[Pt|{{H}_{2}}(g)|\] solution \[X||KCI\] (saturated) \[|H{{g}_{2}}C{{l}_{2}}|Hg|\,Pt\] the observed EMF at \[25{}^\circ C\] was \[600\text{ }mV.\] When solution X was replaced by a standard phosphate buffer with \[pH=7.00,\] the EMF was \[777\text{ }mV\]. Find the pH of solution X.

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