Potassium (K) is element 19 on the periodic table. Calculate the amount (mol) K in 1.81 g mol K

indium, and thallium have three electrons i think

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.