Question

What are the oxidation states of phosphorus in the following: (i) H₃PO₃ (ii) PCl₃ (iii) Ca₃P₂ (iv) Na₃PO₄ (v) POF₃?

Answer 1

Answer:

¡.+3, ¡¡.+3, ¡¡¡.+3,¡v.+5,v.+1

Answer 2

Answer:

Oxidation states of phosphorus in (i) H₃PO₃ is 3.(ii) PCl₃ is 3.(iii) Ca₃P₂ is -3. (iv) Na₃PO₄ is 5. (v) POF₃ is 5.

Explanation:

Let Oxidation state of phosphorous is $x$

(1)H₃PO₃

Oxidation state of hydrogen and oxygen are 1 and -2 respectively.

$1\times 3+x -2\times3=0$

$x=3$

(2)PCl₃

Oxidation state of chlorine is -1.

$x-1\times3=0$

$x=3$

(3) Ca₃P₂

Oxidation state of calcium is +2.

$2\times 3+2x=0$

$x=-3$

(4) Na₃PO₄

Oxidation state of sodium and oxygen are 1 and -2 respectively.

$1\times 3+x-2\times4=0$

$x=5$

(5)POF₃

Oxidation state of flourine and oxygen are -1 and -2 respectively.

$x-2-1\times 3=0$

$x=5$

Oxidation states of phosphorus in (i) H₃PO₃ is 3.(ii) PCl₃ is 3.(iii) Ca₃P₂ is -3. (iv) Na₃PO₄ is 5. (v) POF₃ is 5.