pH 7 being neutral only works at STP (lab temperature). Actually the dissociation constant Kw of water increases a lot across the normal range of seawater (0-30oC), so in tropical seas there’s a lot more of both H+ and OH- around. I’d imagine that molecules of early life could be stable at some temperatures - i.e. in some regions, while not in others.
pH 7 being neutral only works at STP (lab temperature). Actually the dissociation constant Kw of water increases a lot across the normal range of seawater (0-30oC), so in tropical seas there’s a lot more of both H+ and OH- around. I’d imagine that molecules of early life could be stable at some temperatures - i.e. in some regions, while not in others.