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Which of the following aqueous solutions are good buffer systems? . 0.34 M ammonia + 0.33...

Which of the following aqueous solutions are good buffer systems?
.

0.34 M ammonia + 0.33 M sodium hydroxide
.
0.31 M potassium iodide + 0.27 M sodium iodide
.
0.12 M hypochlorous acid + 0.18 M sodium hypochlorite
.
0.24 M nitric acid + 0.21 M potassium nitrate
.
0.10 M calcium hydroxide + 0.29 M calcium chloride

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Homework Answers

Answer #1

acidic buffer is formed by weak acid and its conjugate base

basic buffer is formed by weak base and its conjugate acid

Option 1:

NH3 and NaOH are both base.

So, they cant form buffer

Option 2:

KI is neutral and NaI is also neutral salt.

So, they cant form buffer

Option 3:

HClO is weak acid.

NaClO is its conjugate base.

They will form acidic buffer

Option 4:

HNO3 is strong acid and KNO3 is neutral salt.

So, they cant form buffer

Option 5:

Ca(OH)2 is strong base and CaCl2 is neutral salt.

So, they cant form buffer

Answer: option 3

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