Calculating Total Moles of Ions from CuSO4*5H2O

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In summary, the total moles of ions from CuSO<sub>4</sub>*5H<sub>2</sub>O can be calculated by determining the molar mass of the compound, using the molar ratio of elements, and adding the moles of each ion together. It is important to calculate the total moles of ions to understand the concentration and chemical properties of the compound. The molar mass of CuSO<sub>4</sub>*5H<sub>2</sub>O is 249.68 g/mol and is necessary for the calculation. The presence of water molecules does not affect the calculation of total moles of ions as they do not contribute to the formation of ions.
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carlodelmundo
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Homework Statement



How many total moles of ions are released when the following sample dissolves completely in water?

2.63 g of CuSO4 * 5H2O

Homework Equations



159.611 g / mol of CuSO4

The Attempt at a Solution



I tried doing 2.63 g / [159.611 g / mol] to get .016477 mol of CuSO4. and since there are two ions, Cu2+ and SO42- I just multipled the answer by two and got .032955 mol ions

But that isn't the answer. Am I missing anyhting?
 
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  • #2
Yes, molar mass of hydrate is not that of anhydrous part.

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  • #3
THANKS! That solved my problem. For reference: the answer is .0211 mol ions
 

FAQ: Calculating Total Moles of Ions from CuSO4*5H2O

How do you calculate the total moles of ions from CuSO4*5H2O?

The total moles of ions from CuSO4*5H2O can be calculated by first determining the molar mass of the compound, then using the molar ratio of the elements to find the moles of each ion present. Finally, add the moles of each ion together to find the total moles of ions.

Why is it important to calculate the total moles of ions from CuSO4*5H2O?

Calculating the total moles of ions from CuSO4*5H2O is important in determining the concentration of the solution, as well as understanding the chemical properties and reactions of the compound.

What is the molar mass of CuSO4*5H2O?

The molar mass of CuSO4*5H2O is 249.68 g/mol. This can be calculated by adding the molar masses of each element present in the compound (63.55 g/mol for Cu, 32.07 g/mol for S, 4*16.00 g/mol for O, 5*1.01 g/mol for H).

Can the total moles of ions from CuSO4*5H2O be calculated without knowing the molar mass?

No, the molar mass is an essential component in calculating the total moles of ions from CuSO4*5H2O. Without knowing the molar mass, the moles of each ion cannot be determined accurately.

How does the presence of water molecules affect the calculation of total moles of ions from CuSO4*5H2O?

The presence of water molecules in CuSO4*5H2O does not affect the calculation of total moles of ions. The water molecules are not included in the calculation as they do not contribute to the formation of ions.

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