An acid is a chemical that dissolves in water and when dissolved in water it gives a solution with H+ ions. A base is an aqueous compound that gives electrons, take in protons and the release OH- ions. Acid on the pH scale is 7.0 and below and base on the pH scale is 7.0 and anything else above.
Yes you need to call another ambulance because you need to take care of someone with a broken arm , head injury (also unconscious) you would need another ambulance to check on the pregnant woman and man with cuts and scratches.
