60 mL of 0.3 M KOH and 40 mL of 0.2 M HCl are mixed. What is the pH of the mixture ?

60 mL of 0.3 M KOH and 40 mL of 0.2 M HCl are mixed. What is the pH of

1.	60 mL of 0.3 M KOH and 40 mL of 0.2 M HCl are mixed. What is the pH of the mixture ?
Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Milliequivalents of <a href="https://interviewquestions.tuteehub.com/tag/base-892693" style="font-weight:bold;" target="_blank" title="Click to know more about BASE">BASE</a> =` 60 xx 0.3 = 18`. Milliequivalents of acid `= 40xx 0.2 = 8`<br/> <a href="https://interviewquestions.tuteehub.com/tag/resultant-1187362" style="font-weight:bold;" target="_blank" title="Click to know more about RESULTANT">RESULTANT</a> hydroxyl ion concentration,<br/>`[OH^(-)] = (18 -8)/( 60+40 )= (10)/(100)=(1)/(10) = 0.1`<br/> ` pOH =- <a href="https://interviewquestions.tuteehub.com/tag/log-543719" style="font-weight:bold;" target="_blank" title="Click to know more about LOG">LOG</a>(0.1 )=1` <br/> `[<a href="https://interviewquestions.tuteehub.com/tag/ph-1145128" style="font-weight:bold;" target="_blank" title="Click to know more about PH">PH</a>]=14 -pH` <br/> ` pH =14-1=13.`</body></html>