2 Methylamine, CH NH, (M. - 31), and hydrogen chloride, HCI (M. - 36.5) are both gases which are
soluble in water,
The gases react together to form a white solid, methylammonium chloride
In an experiment to demonstrate rates of diffusion the following apparatus is set up.
Where will the white solid form?
В с
D
cotton wool soaked in
concentrated methylamine
solution
cotton wool soaked in
concentrated
hydrochloric acid

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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