Before 7 after 9. A pH smaller than 7 indicates acidity with 0 being completely acidic. A pH greater than 7 shows alkalinity with 14 being completely alkaline. 7 is neutral. Since NaOH is alkaline, adding it to a neutral substance would increase the pH and it would increase from 7 to 9.
That Energy Cannot Be Created Nor Destroyed
No I don’t think so. But it worth a try tho. Try it out.
When there was know life on the earth
According to this photo, or i can recommend this video that helped me by tapton physics.