Can someone help pls! I’m very confused on this!!

10-14. (a) when 100.0 ml of weak acid ha were titrated with 0.093 81 m naoh, 27.63 ml were required to reach the equivalence point. find the molarity of ha. (b) what is the formal concentration of a- at the equivalence point? (c) the ph at the equivalence point was 10.99. find pk. for ha. (d) what was the ph when only 19.47 ml of naoh had been added?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work