how many moles of Cl- ion in the solution containing 0.187g Cl- dissolved in 50.0 ml water.
mols Cl^- = grams/atomic mass = 0.187 g/34.453 = ?? but look up that number to make sure it is right.
Thanks
To find the number of moles of Cl- ion in the solution, we need to use the concept of molarity.
First, we need to convert the mass of Cl- ion (0.187g) into moles. We can do this by dividing the mass by the molar mass of chloride ion (Cl-), which is about 35.45 g/mol.
Number of moles of Cl- ion = mass of Cl- ion / molar mass of Cl- ion
= 0.187g / 35.45 g/mol
Next, we need to determine the volume of the solution in liters. The given volume is 50.0 ml, so we need to convert it to liters by dividing it by 1000.
Volume of solution = 50.0 ml / 1000
= 0.0500 L
Finally, we can calculate the molarity (M) of the solution using the formula:
Molarity (M) = Number of moles / Volume of solution (in liters)
Molarity of the solution = Number of moles of Cl- ion / Volume of solution
Plug in the values:
Molarity of the solution = (0.187g / 35.45 g/mol) / 0.0500 L
Once you calculate this, you will obtain the molarity of the solution.