we used the solution NiSO4 6H20
- i have to find the mass of solute dissolved in a 25ml solution.
- and the molar concentration.
I hope you have more information than that.
To find the mass of solute dissolved in a 25 mL solution, we need to know the molar mass of the compound NiSO4 · 6H2O (nickel sulfate hexahydrate).
1. Determine the molar mass of NiSO4 · 6H2O:
- Molar mass of Ni = atomic mass of nickel (Ni) = 58.69 g/mol
- Molar mass of S = atomic mass of sulfur (S) = 32.06 g/mol
- Molar mass of O = atomic mass of oxygen (O) = 16.00 g/mol
- Molar mass of H = atomic mass of hydrogen (H) = 1.01 g/mol
- Count the number of each atom in the compound:
- Ni: 1
- S: 1
- O: 4 (as there are four oxygen atoms in the sulfate (SO4) ion)
- H: 12 (as each water molecule (H2O) contains 2 hydrogen atoms and there are 6 water molecules)
- Multiply the molar mass of each atom by its respective count and sum them up:
- Molar mass of NiSO4 · 6H2O = (1 * 58.69) + (1 * 32.06) + (4 * 16.00) + (12 * 1.01) = 262.86 g/mol
2. Calculate the mass of solute:
- The molar mass of NiSO4 · 6H2O is 262.86 g/mol.
- Dividing the molar mass by 1000 converts it to grams per mole.
- Multiply the molar mass (in g/mol) by the number of moles to get the mass:
- Mass of solute = (262.86 g/mol) * (25 mL / 1000 mL/mL) = 6.57 g
To find the molar concentration of the solution, we need to know the number of moles of solute and the volume of the solution.
3. Calculate the molar concentration (also known as molarity):
- Molar concentration (M) is defined as the number of moles of solute divided by the volume of the solution in liters (L).
- Convert the volume of the solution from milliliters (mL) to liters (L):
- Volume of solution (L) = 25 mL / 1000 mL/L = 0.025 L
- Divide the number of moles of solute by the volume of the solution in liters:
- Molar concentration (M) = 6.57 g / 0.025 L = 262.8 mol/L
Therefore, the mass of solute dissolved in a 25 mL solution is 6.57 grams, and the molar concentration is 262.8 mol/L.