To determine the chemical identity of the solid, we need to calculate the molar mass of each compound and compare it to the given data.
I) Sodium chloride (NaCl):
Molar mass = 22.99 g/mol (Na) + 35.45 g/mol (Cl) = 58.44 g/mol
II) Copper carbonate (CuCO3):
Molar mass = 63.55 g/mol (Cu) + 12.01 g/mol (C) + 3(16.00 g/mol) (O) = 123.55 g/mol
III) Sodium carbonate (Na2CO3):
Molar mass = 2(22.99 g/mol) (Na) + 12.01 g/mol (C) + 3(16.00 g/mol) (O) = 105.99 g/mol
Given data:
Mass of solid = 1.06 g
Number of moles of compound = 0.01 mol
Now, we can calculate the molar mass of the solid using the formula:
Molar mass = (Mass of solid) / (Number of moles of compound)
Molar mass = 1.06 g / 0.01 mol = 106 g/mol
Comparing the calculated molar mass (106 g/mol) to the molar masses of the compounds:
- Sodium chloride (NaCl): 58.44 g/mol
- Copper carbonate (CuCO3): 123.55 g/mol
- Sodium carbonate (Na2CO3): 105.99 g/mol
The closest match to the calculated molar mass is Sodium carbonate (Na2CO3). Therefore, the chemical identity of the solid is Sodium carbonate (Na2CO3).