Answer:
Drought, resulting in a 65% reduction in water levels.
H2So4 is a strong acid and a strong electrolyte which means that when this dissociates in water, the dissociation process is complete. The first dissociation is
H2 SO4 = H + HSO4-
This can further release H+ and dissociate SO4- instead already
A
not every expirement has control
Resistance of a material being scratched in known as: Hardness
