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H(3)PO(4) is a tribasic acid and one of ...

`H_(3)PO_(4)` is a tribasic acid and one of its salts of `NaH_(2)PO_(4)`. What volume of 1 M NaOH should be added to 12 g `NaH_(2)PO_(4)` (molecular mass = 120 g/mole) to exactly convert it into `Na_(3)PO_(4)`

A

80 mL

B

100 mL

C

200 mL

D

300 mL

Text Solution

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The correct Answer is:
C
`1 xx V = (12)/(120) xx 2 = .2L = 200 mL`
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Objective question (single correct answer). i. H_(3) PO_(4) is a tribasic acid and one of its salt is NaH_(2) PO_(4) . What volume of 1M NaOH solution should be added to 12 g of NaH_(2) PO_(4) to convert in into Na_(3) PO_(4) ? a. 100 mL b. 2 mol of Ca (OH)_(2) c. Both d. None iii. The normality of a mixture obtained mixing 100 mL of 0.2 m H_(2) SO_(4) with 100 mL of 0.2 M NaOH is: a. 0.05 N b. 0.1 N c. 0.15 N d. 0.2 N iv 100 mL solution of 0.1 N HCl was titrated with 0.2 N NaOH solutions. The titration was discontinued after adding 30 mL of NaOH solution. The reamining titration was completed by adding 0.25 N KOH solution. The volume of KOH required from completing the titration is: a. 70 mL b. 35 mL c. 32 mL d. 16 mL

The chemical name of NaH_(2)PO_(4) is -

H_(3)PO_(4) is tribasic while H_(3)PO_(3) is dibasic. Explain.

STATEMENT -1 : H_(3)PO_(4) is a tribasic acid. and STATEMENT -2 : In H_(3)PO_(4) , only two H-atoms are replaceable.

The addition of NaH_(2)PO_(4) to 0.1M H_(3)PO_(4) will cuase

Statement-1 : Both H_(3)PO_(3) and H_(3)PO_(4) have the same number of hydrogen atoms but H_(3)PO_(4) is a tribasic acid and H_(3)PO_(3) is a dibasic acid. Statement-2 : 1 mol of H_(3)PO_(3) is neutralised by 2 mol of NaOH while 1 mol of H_(3)PO_(4) is neutralised by 3 mol of NaOH

In the reaction P + NaOH rarr PH_(3) +NaH_(2)PO_(2)

The oxidation state of "'p'" in "\(NaH_{2}PO_{4}\)