gen chem question

[rah08e]

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Which of the following, if added to a saturated (aq) solution of NaCl, would most effectively reduce the Cl ion concentration?

Without looking at the answer choices, does anyone have a good explanation on how to tackle problems like these?

The answer choices are:

AgNO3
Ba(NO3)2
K2SO4
H2S
CH3COOH

 

[rah08e]

nevermind lol

.... i found from my Chad's notes: Pb2+, Ag+, Hg2+ salts are INSOLUBLE!

 

[AlbinoPolarBear]

Which of the following, if added to a saturated (aq) solution of NaCl, would most effectively reduce the Cl ion concentration?

Without looking at the answer choices, does anyone have a good explanation on how to tackle problems like these?

The answer choices are:

AgNO3
Ba(NO3)2
K2SO4
H2S
CH3COOH

So your solution of NaCl will have Na+ and Cl-.
Adding one of these will reduce the Cl- concentration, by precipitating when reacted with the Cl-.

Let's just look at the cations of each species.

Ag+ + Cl- = AgCl
Ba2+ + Cl- = BaCl2
K+ + Cl- = KCl
H+ + Cl- = HCl
H+ + Cl- = HCl

From that list, only AgCl will form a precipitate (Know your solubility rules), and will reduce the Cl- ion concentration.