The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H PO solution and 100 mL of 2 M H PO solution, respectively, are: 3 3 3 2 3 3 2 3 2 ml ml ml 3 2 2 2 2 ml ml (A) 100 mL and 5

Question

The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H PO solution and 100 mL of 2 M H PO solution, respectively, are: 3 3 3 2 3 3 2 3 2 ml ml ml 3 2 2 2 2 ml ml

(A) 100 mL and 50 mL
(B) 50 mL and 50 mL
(C) 100 mL and 200 mL
(D) 100 mL and 100 mL

Prashant Kotian · Accepted Answer

Correct answer: C) 100 ML AND 200 ML. (1) 2NaOH + H PO → Na HPO + 2H O 100m mole 50m mole 100m mole = M × V 100m mole = 1 x V V = 100 ml (2) NaOH + H PO → NaH PO + H O 200 m mole 200 m mole 200m mole = M × V V = 200 ml

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