From the following data ,calculate the percentage of KCl in sample of chloride weight of the sample 0.1865, volume of AgNOS required 26.50mL and Ag of AgNO3 =0.008700gram
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Please proof your post and make changes to make it make sense. What's AgNOS?
"required 26.50 mL and Ag of AgNO3 = 0.008700g" makes no sense at all.
To calculate the percentage of KCl in the sample, we first need to determine the amount of KCl present and then calculate its percentage.
1. Find the amount of AgCl formed:
Since AgNO₃ reacts with Cl⁻ in KCl to form AgCl, we can use the mass of AgNO₃ and the molar ratio to find the amount of AgCl.
- Given: Mass of AgNO₃ = 0.008700 g
2. Convert the mass of AgNO₃ to moles:
We can convert the mass of AgNO₃ to moles by dividing it by the molar mass of AgNO₃.
- Molar mass of AgNO₃ = atomic mass of Ag + (atomic mass of N + 3 * atomic mass of O)
- Molar mass of AgNO₃ ≈ 107.87 g/mol + (14.01 g/mol + 3 * 16.00 g/mol)
3. Calculate the moles of AgCl formed:
Since the molar ratio of AgNO₃ to AgCl is 1:1, the moles of AgNO₃ equal the moles of AgCl formed.
4. Calculate the moles of KCl:
Since the molar ratio of AgCl to KCl is 1:1, the moles of AgCl formed also equal the moles of KCl present in the sample.
5. Find the mass of KCl:
Using the moles of KCl, we can calculate the mass of KCl by multiplying the moles by the molar mass of KCl.
- Molar mass of KCl = atomic mass of K + atomic mass of Cl
6. Calculate the percentage of KCl:
Finally, we can calculate the percentage of KCl in the sample by dividing the mass of KCl by the weight of the sample and multiplying by 100.
Here's a step-by-step solution:
1. Determine moles of AgNO₃:
Moles of AgNO₃ = Mass of AgNO₃ / Molar mass of AgNO₃
2. Calculate moles of KCl and AgCl:
Moles of KCl = Moles of AgCl = Moles of AgNO₃
3. Calculate mass of KCl:
Mass of KCl = Moles of KCl × Molar mass of KCl
4. Calculate percentage of KCl:
Percentage of KCl = (Mass of KCl / Weight of the sample) × 100
Plug in the values you have and use the above calculations to find the percentage of KCl in the sample.