The `pH` of milk, black coffee, tomato juice, lemon juice and egg white are `6.8, 5.0, 4.2, 2.2` and `7.8` respectively. Calculate corresponding hydrogen ion concentration in each.

Explanation

`(a) [H^(+)]` of milk
`pH =6.8 " or " -log [H^(+)] =6.8 " or " log [H^(+)] =- 6.8`
`[H^(+)] = "Antilog " (-6.80) = " Antilog " (bar(7).20) =1.58 xx 10^(-7) M`
`(b) [H^(+)]` of block coffe
`pH =5.0 " or " - log [H^(+)] =5.0 " or " log [H^(+)] =- 5.0`
`[H^(+)] = "Antilog " (-5.0) = " Antilog " bar(5) = 10^(-5) M`
(c) `[H^(+)]` of tomato juice
`pH =4.2 " or " - log [H^(+)] =4.2 " or " log [H^(+)] =- 4.2`
`[H^(+)] = "Antilog " (-4.2) = " Antilog" (bar(5).80) =6.31 xx 10^(-5)M`
(d) `[H^(+)]` of lemon juice
`pH =2.2 " or " - log [H^(+)] =2.2 " or " log [H^(+)] =- 2.2`
`[H^(+)] = " Antilog " (-2.2) = " Antilog" (bar(3).80) =6.310 xx 10^(-3)M`
`(e) [H^(+)]` of egg white
`pH =7.8 " or " - log [H^(+)] =7.8 " or " log [H^(+)] =- 7.8`
`[H^(+)] = " Antilog" (-7.8) = " Antilog " (bar(8).20) = 1.58 xx 10^(-8) M`