i need help finding the answers to 2. a and b and 3. a and b I must show my work

Question

i need help finding the answers to 2. a and b and 3. a and b I must show my work to get credit 2. A 10.00 mL diluted chloride sample required 44.89 mL of 0.01982 M AgNO, to reach the Fajans end point a. How many moles of Cl ion were present in the sample? (Use Egs. 2 and 3.) moles Cl b. What was the concentration of chloride in the diluted solution? 3. How would the following emors affect the mass percent Cl obtained in Question 2c? Give your reason- ing in each case. a. The student read the molarity of AgNO as 0.01982 M instead of 0.01892 M. b. The student was past the end point of the titration when he took the final buret reading.

Explanation / Answer

Question 2.

a)

moles of Cl- in sample:

mol of Cl- = mol of Ag since

Ag+ + Cl- = AgCl(s)

so

mol of Ag+ = MV = (44.89*10^-3)(0.01982) = 0.0008897198 mol of Ag+

so

mol of Cl- = 0.0008897198 mol

b)

[C-] = mol of Cl- / volume of Cl- solution

so

V = 100 mL of diluted sample

[Cl-] = 0.0008897198 / 0.1 = 0.008897198 M of Cl-

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