1.) A sample containing 0.221 g Cl- is dissolved in 50.0 mL water
a) How many moles of Cl- ion are in the solution?
b) What is the molarity of the Cl- ion in the solution?
2.) A solid chloride sample weighing 0.3147 g required 43.75 mL of 0.05273 M AgNO3 to reach the AgCrO4 end point.
A) how many moles Cl- ion were present in the sample?
B) how many grams Cl- ion were present?
c) what was the mass percent cl- ion in the sample?

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You need to know moles, you have mass.
\[\text{moles} = \frac{\text{mass}}{\text{molar mass}}\]

@whpalmer , do i find the molar mass of Cl and divide it by 0.221 g? What about the 50 mL of water?

@whpalmer so 0.221g/35.35g/mol?

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