Directions: Perform an experiment based on the steps of scientific method. Problem:
Hypothesis:

Materials:
Dirty or dull peso coins
Salt
Vinegar
Small container
Paper towels (tissue)
patulong po kung may sagot napo kayo dto salamat po hanggang mamaya alang po kasi

They are all decomposition reactions.

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