PLEASE HELP 6.203g of Na2CO3.xh2o was dissolved in water and the solution made up of 1000cm3. If 25cm3 of this solution requires 20.5cm3 of 0.122moldm-3 hydrochloric acid for complete neutralisation, calculate the mass of the hydrated salt​

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

Must be negative.substance increases