A) 10.5 B) 8.49 C) 3.51 D) 3.5
There is a table of Kw versus temperature here http://www.chemguide.co.uk/physical/acidbaseeqia/kw.html then use [H+][OH-]=Kw to find [H+] the find pH Alternatively find pOH find pKw then pH=pKw-pOH
You can ask a new question or answer this question.