Students in a biology class thought that salt water would affect the movements of planaria.
They put 25 planaria in salt water and
recorded their observations.
Which flaw was present
in the design of their
experiment?

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Answeropposite;

#2- the hno3 has a h+ ion and the naoh has an oh- ion