Using a cup, carefully pour water into the river, allowing it to flow from one end to the other (if needed, prop one end of the pan on top of the textbook to give it slope). Observe what happens to the sand as the water flows down the river and write down your observations.

Which of the following did you identify correctly

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