What is the molar concentration of calcium hydroxide that has 0.185g solute in 100ml solution?
To find the molar concentration of calcium hydroxide, we need to calculate the number of moles of the solute (calcium hydroxide) and then divide it by the volume of the solution.
First, let's calculate the number of moles of calcium hydroxide. We can use its molar mass to do this.
The molar mass of calcium hydroxide is:
Calcium (Ca) = 40.08 g/mol
Oxygen (O) = 16.00 g/mol (there are two oxygen atoms)
Hydrogen (H) = 1.01 g/mol (there are two hydrogen atoms)
So, the molar mass of calcium hydroxide is:
40.08 g/mol (Ca) + (2 * 16.00 g/mol (O)) + (2 * 1.01 g/mol (H)) = 74.10 g/mol
Now, we can calculate the number of moles using the mass of the solute and the molar mass.
Number of moles = mass of solute / molar mass
In this case,
Number of moles = 0.185 g / 74.10 g/mol
Next, we divide the number of moles of solute by the volume of the solution to find the molar concentration.
Molar concentration = number of moles / volume of solution
Since the volume is given in milliliters (ml), we need to convert it to liters (L) by dividing by 1000.
Volume of solution = 100 ml / 1000 = 0.1 L
Finally, we can substitute the values into the equation:
Molar concentration = (0.185 g / 74.10 g/mol) / 0.1 L
Now, calculate the result to find the molar concentration of calcium hydroxide.