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Question

The mass of AgCl precipitated when a solution containing 11.70 g of NaCl is added to a solution containing 3.4g of AgNO3 is:
[Atomic mass of Ag = 108, Atomic mass of Na = 23]

A
5.74 g
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B
1.17 g
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C
2.87 g
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D
6.8 g
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Solution

The correct option is C 2.87 g
NaCl+AgNO3AgCl+NaNO3
MAgCl=143.5 u, MNaCl=58.5 u, MAgNO3=170 u
Moles of NaCl=11.7058.5=0.2 mol
Moles of AgNO33.4170=0.02 mol
AgNO3 is the limiting reagent here, all of it gets used up.
Mass of AgCl = 0.02×143.5=2.87 g

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