2007-03-04 14:35:08 · 3 answers · asked by aaaaa 2 in Science & Mathematics ➔ Chemistry
[H3O+] = 1 x 10^-5
[OH-] = 1 x 10^-9
pH = -log [H+]
pOH = 14 - pH = -log [OH-]
2007-03-04 14:55:05 · answer #1 · answered by TheOnlyBeldin 7 · 0⤊ 0⤋
First make certain what number mols of NaOH you've. n=m/M, m= 2.50 g and M, the molecular mass of NaOH, is 40 g/mol. you've for this reason n= 0.0625 mol NaOH There are as many molecules(mol) NaOH as are molecules (mol) of OH-. meaning you've 0.0625 mol OH- and considering there are as many atoms(mol) H as there are molecules (mol) OH- you've 0.0625 mol H. submit to in ideas a million mol includes 6.023*10^23 atoms or molecules
2016-11-27 22:03:15 · answer #2 · answered by ? 4 · 0⤊ 0⤋
I'll give you a hint. You need to use the Log button on your calculator....
2007-03-04 14:42:40 · answer #3 · answered by adamstivala 2 · 0⤊ 0⤋