In the analysis of 0.8503 g of impure chloride containing sample, 1.250 g of AgCl were precipitated out. What is the percent of mass of chlorine in the sample. (FW of AgCl = 143.32 g/mol, FW of Cl =35.453)
34.64 percent
To find the mass percent of chlorine in the sample, we need to calculate the mass of chlorine in AgCl and then calculate the percentage.
Step 1: Calculate the moles of AgCl precipitated
First, we need to calculate the moles of AgCl that were precipitated.
Molar mass of AgCl = 143.32 g/mol
Mass of AgCl precipitated = 1.250 g
Number of moles = mass / molar mass
Number of moles of AgCl = 1.250 g / 143.32 g/mol = 0.00871 mol
Step 2: Calculate the moles of chlorine in AgCl
Since AgCl contains 1 mole of chlorine per mole of AgCl, the number of moles of chlorine is the same as the moles of AgCl.
Number of moles of Cl = 0.00871 mol
Step 3: Calculate the mass of chlorine in the sample
Now, we can calculate the mass of chlorine in the sample.
Molar mass of Cl = 35.453 g/mol
Mass of Cl = number of moles × molar mass
Mass of Cl = 0.00871 mol × 35.453 g/mol = 0.309 g
Step 4: Calculate the mass percent of chlorine in the sample
Finally, we can calculate the mass percent of chlorine in the sample.
Mass percent of Cl = (mass of Cl / mass of sample) × 100%
Mass percent of Cl = (0.309 g / 0.8503 g) × 100%
Mass percent of Cl = 36.37%
Therefore, the mass percent of chlorine in the sample is approximately 36.37%.
To find the percent mass of chlorine in the sample, we need to determine the mass of chlorine in the AgCl precipitate and then express it as a percentage of the initial mass of the sample.
First, we need to calculate the number of moles of AgCl precipitate. We can do this by dividing the mass of AgCl by its molar mass:
Moles of AgCl = mass of AgCl / molar mass of AgCl
= 1.250 g / 143.32 g/mol
≈ 0.00872 mol
Next, we need to determine the moles of chlorine in the AgCl. Since each molecule of AgCl contains one mole of chlorine, the moles of chlorine will be equal to the moles of AgCl:
Moles of chlorine = moles of AgCl
= 0.00872 mol
Now, we can find the mass of chlorine in the sample by multiplying the moles of chlorine by its molar mass:
Mass of Cl = moles of Cl × molar mass of Cl
= 0.00872 mol × 35.453 g/mol
≈ 0.3086 g
Finally, we can calculate the percent of mass of chlorine in the sample by dividing the mass of chlorine by the initial mass of the sample and multiplying by 100:
Percent mass of Cl = (mass of Cl / initial mass of sample) × 100
= (0.3086 g / 0.8503 g) × 100
= 36.29%
Therefore, the percent mass of chlorine in the sample is approximately 36.29%.
mm = molar mass
Do you want chlorine (Cl2) or Cl^-. If you want Cl2 it is
grams Cl2 = grams AgCl x (mm Cl2/mmAgCl)
Then % Cl2 = (grams Cl2/grams sample)*100 = ?
If you want Cl^- (which I think you want) it is
g Cl^- = grams AgCl x (mm Cl/mmAgCl)
Then %Cl = (g Cl^-/g sample)*100 = ?