Calculate [H3O+] and [OH-] for each solution at 25 °C. a. pH = 8.55

Video transcript

Hello. In this problem at 25 degrees Celsius, we are asked, what are the values of the hydro ni um and hydroxide ion concentration for a solution with a Ph of 3.55 col at 25 degrees Celsius. The Ph plus the P O H is equal to 14. And so our P O H then will be equal to 14 minus the ph This be 14 -3.55. So our POH works out to 10.45. You can find the hydrogen ion concentration by taking 10 to the negative Ph that's 10 to the negative 3.55. So our high joining my concentration works out to 2.8 times 10 - Mueller. And we can find our hydroxide ion concentration. It's equal to 10 to the minus P O H. So that's equal to 10 to the -10.45. And so our hydroxide ion concentration works out to 3.5 Times 10 to the -11 Moller. So we could do a check on our work. The iron product constant water at 25 degrees Celsius tells us that the hydrogen ion concentration type. The hydroxide iron concentration is equal to one times 10 to minus 14. So we can plug in the values that we found for our hydro mind concentration and our hydroxide in concentration to verify that we got the correct concentrations. Thanks for watching. Hope this out.