Question

A mixture of 78.7 mL of hydrogen and 112 mL of oxygen is ignited by a spark to form water.

(a) Does any gas remain unreacted? Which one, H₂ or O₂?

(b) What volume of gas (if any) remains unreacted? (Assume the same conditions before and after the reaction.)

112-78.7/2 mL H2

78.7-112 mL H2

112-78.7/2 mL  O2

Answer 1

- Ans Reaction 2.4, 18) is + 0,(8) -> 240 (l) (a) 2 volumes of - so 2 mL of the x 1 mL of the so 78.7 mL of H₂ We have 112 m2 clearly amount so some of the y react with I volume of 02. react with ImL of 2. react with mL af . react with 187 mL of O2. of 2 of O2 is in excess ( 112 m2 7187 m2) oxygen remain unreacted | _ _ 2 (b) Amount of O₂ reacted = 18. 1 mL Total amount of O2 = 112 mL Amorint of On left- 112 m2 - 78.1 mL (112-18,19 m2 of Oz (Thierd ofticm) Answer.