Which atom(s) is/are electrophilic in methanol (ch3oh)?

Let us understand the two terms

a) Nucleophile: which can give electrons it can be either negative or neutral

b) electrophile: which can accept electrons due to empty orbitals or incomplete octet. It can be positive or neutral

In methanol

Oxygen carries two lone pairs of electrons so it will be nucleophilic

while carbon and hydrogen being bonded to highly electronegative atom oxygen will be electrophilic

so answer is

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.