1.1. A student carries out an investigation to identify the carbonate of an unknown metal, X₂CO₃. 

They measure the mass loss when the X₂CO₃ reacts with excess hydrochloric acid to form the metal chloride XCl. 

Complete the balanced symbol equation, including state symbols, for this reaction.

X₂CO₃ (___) + 2HCl (___) → 2XCl (aq) + _____ (g) + _____ (l)

1.2. The student carries out the reaction using this method:

1. Add 50 cm³ HCl (aq) to a conical flask and weigh.

2. Add X₂CO₃ to the conical flask and immediately reweigh.  

3. After 5 minutes, reweigh the conical flask and contents.

  Results

  Calculate the amount, in mol, of CO₂ released in the reaction.

  Amount of CO₂ = __________ mol

1.3. The reactant X₂CO₃ forms the product XCl. 

Explain, with reasons, which group of the periodic table the metal X belongs to.

1.4. Calculate the mass of the unknown metal carbonate, X₂CO₃, that the student used in their experiment.

1.5. The student calculates the molar mass of the unknown metal carbonate, X₂CO₃, to be 325.76 g mol^-1. 

Identify metal X by calculating the relative atomic mass.