Calculate the pH of the following half-cells solutions : (a) `PtH_(2) ("1 atm")|H^(+) (HCl), " "E=0.25" volt"` (b) `PtH_(2) ("1 atm")|H^(+) (H_(2)SO_(

Question

Calculate the pH of the following half-cells solutions : (a) `PtH_(2) ("1 atm")|H^(+) (HCl), " "E=0.25" volt"` (b) `PtH_(2) ("1 atm")|H^(+) (H_(2)SO_(

Calculate the pH of the following half-cells solutions :
(a) `PtH_(2) ("1 atm")|H^(+) (HCl), " "E=0.25" volt"`
(b) `PtH_(2) ("1 atm")|H^(+) (H_(2)SO_(4))," "E=0.3" volt"`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

(a) `H_(2) rarr 2H^(+)+2e`
`E_(H_(2)//H^(+))=E_(H_(2)//H^(+))^(@)-0.0591/2"log" ([H^(+)]^(2))/P_(H_(2))`
`=0.0-0.0591 "log" ([H^(+)])/1`
`0.25=0.0591 pH`
`pH=0.25/0.0591=4.23`
(b) `E_(H_(2)//H^(+))=E_(H_(2)//H^(+))^(@)-0.0591/2"log" ([H^(+)]^(2))/P_(H_(2))`
`=0.0-0.0591 "log" ([H^(+)])/(1)`
`0.3=0.0591 pH`
`pH=0.3/0.0591=5.076`