SATHEE: pBlock ElementsII 1 Question 99

pBlock ElementsII 1 Question 99

95. Draw balanced equations for

(i) the preparation of phosphine from $CaO$ and white phosphorus.

(ii) the preparation of ammonium sulphate from gypsum, ammonia and carbon dioxide.

$(1990, 2 M)$

Show Answer

Solution:

(i) $15 CaO + 4 P_{4} \overset{Δ}{⟶} 5 {Ca}_{3} P_{2} + 3 P_{2} O_{5} ↑$

$[{Ca}_{3} P_{2} + 6 H_{2} O ⟶ 3 Ca (OH)_{2} + 2 {PH}_{3} ↑] \times 5$

$\overset{―}{15 CaO + 4 P_{4} + 30 H_{2} O ⟶ 15 Ca (OH)_{2} + 3 P_{2} O_{5} ↑ + 10 {PH}_{3} ↑}$

(ii) $2 {NH}_{3} + {CO}_{2} + H_{2} O ⟶ {({NH}_{4})}_{2} {CO}_{3}$ ${CaSO}_{4} + {({NH}_{4})}_{2} {CO}_{3} ⟶ {CaCO}_{3} ↓ + {({NH}_{4})}_{2} {SO}_{4}$ gypsum

$\overset{―}{{CaSO}_{4} + 2 {NH}_{3} + {CO}_{2} + H_{2} O ⟶ {CaCO}_{3} ↓ + {({NH}_{4})}_{2} {SO}_{4}}$

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pBlock ElementsII 1 Question 99

95. Draw balanced equations for

Solution:

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