treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl.
how many grams of sodium chloride were in the sample?
What is the weight percentage of NaCl in the sample?
See your post above.
To determine the number of grams of sodium chloride (NaCl) in the sample, you can use stoichiometry and the molar mass of AgCl.
1. Calculate the molar mass of AgCl:
The molar mass of silver chloride (AgCl) is 107.87 g/mol.
2. Determine the number of moles of AgCl formed:
Moles of AgCl = Mass of AgCl / Molar mass of AgCl
Moles of AgCl = 0.7331 g / 107.87 g/mol
3. Since sodium chloride reacts in a 1:1 ratio with silver chloride, the number of moles of NaCl in the sample is the same as the moles of AgCl formed.
4. Calculate the mass of NaCl:
Mass of NaCl = Moles of NaCl * Molar mass of NaCl
Mass of NaCl = Moles of AgCl * Molar mass of NaCl
Mass of NaCl = (0.7331 g / 107.87 g/mol) * Molar mass of NaCl
To determine the weight percentage of NaCl in the sample:
5. Calculate the total mass of the sample:
Total mass of the sample = Mass of NaCl + Mass of impurities
6. Calculate the weight percentage of NaCl:
Weight percentage of NaCl = (Mass of NaCl / Total mass of the sample) * 100
You will need to know the molar mass of NaCl to complete the calculations. The molar mass of NaCl is 58.44 g/mol.
Note: The molar mass values used in the calculations are approximate and may vary slightly depending on the level of precision required.