determine the theoretical % composition of water in bluestone
To determine the theoretical percent composition of water in bluestone, we first need to know the chemical formula of bluestone. Bluestone, also known as copper(II) sulfate pentahydrate, has the chemical formula CuSO4·5H2O.
From the formula, we can see that there are 5 water molecules (H2O) for every one copper(II) sulfate molecule (CuSO4).
To calculate the percentage composition of water in bluestone, we need to find the molar mass of CuSO4·5H2O and then find the molar mass of water within it.
The molar mass of CuSO4 is:
Cu: 63.55 g/mol
S: 32.07 g/mol
O: 16.00 g/mol
Total: 63.55 + 32.07 + (4 * 16.00) = 159.62 g/mol
The molar mass of 5H2O is:
5(H2O): (5*2(H) + 5*16(O)) = 90.00 g/mol
The total molar mass of CuSO4·5H2O:
159.62 + 90.00 = 249.62 g/mol
The molar mass of water in bluestone is:
90.00 g/mol / 249.62 g/mol = 0.3603
This means that water makes up 36.03% of the molar mass of bluestone.
Therefore, the theoretical percentage composition of water in bluestone is approximately 36.03%.