Buffer solutions

VITEEE 2015 Coaching › Physical Chemistry questions › Buffer solutions

FIITJEE says in its solutions to full test 11 that,

100 ml of 0.1M NaH₂PO₄ + 10ml 0.1M NaOH is an 'acidic ' buffer,do you agree?

#Chemistry #Physical Chemistry

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5 Answers

33

Abhishek Priyam ·2009-02-17 04:17:16

[12] don know...

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39

Dr.House ·2009-02-17 04:18:56

an acidic buffer is a solution of weah acid and salt of weak acid with strong base.

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tapanmast Vora ·2009-02-17 04:29:09

i guess its true......

Coz dont get confused by NaOh, as it is it never participatges in Buffer formation as MAthie mentioned its definition!!"

NaH₂PO₄ exists as a buffer itself in a solution, jus like "Borax" if u remember....

role of NaOH (mayb) wud b to bring abt dissociation of NaH2PO4

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1

Vivek ·2009-02-17 10:17:02

is the pH < 7???

hydrolysis should give phosphoric acid and sodium hydroxide,but since phosphoric acid is a weak acid pH should be >7,shouldn't it?

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voldy ·2009-02-17 22:09:45

well I'd say yes . it truns out that the buffer will be of NaH2PO4 and Na2HPO4 . dunno pH wala

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