1a) Calculate the molar concentration of the KIO3 solution provided.
KIO3 2.15g/L
we used 10 mL in the experiment.
did you use 2.15 g in 10 ml, or did you use a .0215 grams?
Assuming you used 2.15 g in 10 ml, then
M=2.15/molmass/.01=215/214= about 1 Molar
To calculate the molar concentration of the KIO3 solution, we need to know the molar mass of KIO3. The molar mass of KIO3 can be calculated by summing the atomic masses of its constituent elements: potassium (K), iodine (I), and oxygen (O).
The atomic masses are as follows:
Potassium (K) = 39.10 g/mol
Iodine (I) = 126.90 g/mol
Oxygen (O) = 16.00 g/mol
Therefore, the molar mass of KIO3 can be calculated as:
Molar mass of KIO3 = (1 * atomic mass of K) + (1 * atomic mass of I) + (3 * atomic mass of O)
= (1 * 39.10 g/mol) + (1 * 126.90 g/mol) + (3 * 16.00 g/mol)
= 214.10 g/mol
Next, we need to calculate the number of moles of KIO3 in the 10 mL of solution. To do this, we have to convert the mass of KIO3 to moles using the following equation:
Number of moles = Mass / Molar mass
Mass of KIO3 = 2.15 g/L * 10 mL * (1 L / 1000 mL)
= 0.0215 g
Number of moles = 0.0215 g / 214.10 g/mol
≈ 0.0001 mol
Finally, we can calculate the molar concentration of the KIO3 solution by dividing the number of moles by the volume of the solution (in liters):
Molar concentration = Number of moles / Volume of solution in liters
Volume of solution = 10 mL * (1 L / 1000 mL)
= 0.01 L
Molar concentration = 0.0001 mol / 0.01 L
= 0.01 M
Therefore, the molar concentration of the KIO3 solution provided is approximately 0.01 M.
To calculate the molar concentration of a solution, we need to know the molar mass of the solute (KIO3) and the volume of the solution used.
1. Determine the molar mass of KIO3:
The molar mass of potassium iodate (KIO3) can be calculated by summing up the atomic masses of all its constituent elements:
K (potassium) = 39.10 g/mol
I (iodine) = 126.90 g/mol
O (oxygen) = 16.00 g/mol (there are 3 oxygen atoms in KIO3)
Molar mass of KIO3 = (39.10 g/mol) + (126.90 g/mol) + (16.00 g/mol x 3) = 214.00 g/mol
2. Convert the given mass of KIO3 into moles:
Given: Mass of KIO3 = 2.15 g/L x 10 mL = 21.50 g
Moles of KIO3 = mass / molar mass
Moles of KIO3 = 21.50 g / 214.00 g/mol = 0.100 mol
3. Calculate the molar concentration (Molarity):
Molarity (M) = moles of solute / volume of solution in liters
In this case, the volume of the solution used is 10 mL, which is equivalent to 0.010 L.
Molarity (M) = 0.100 mol / 0.010 L = 10.00 M
Therefore, the molar concentration of the KIO3 solution provided is 10.00 M.