If 30 mL of H2 and 20 mL of O2 react to form water, what is left at the end of the reaction?

Question

If 30 mL of H2 and 20 mL of O2 react to form water, what is left at the end of the reaction? (A) 10 mL of H2 (B) 5 mL of H2 (C) 10 mL of O2 (D) 5 mL of O2

Tardigrade Admin · Accepted Answer

2H2+O2 arrow 2H2O Combining volume ratio of H2 and O2 =2:1 Here H2 is limiting reactant. 30 ml of H2 will react with 15 ml of O2 and 5 ml of O2 will remain unreacted at the end.

Q. If $30$ $m L$ of $H_{2}$ and $20$ $m L$ of $O_{2}$ react to form water, what is left at the end of the reaction?

$10$ $m L$ $o f$ $H_{2}$

$5$ $m L$ $o f$ $H_{2}$

$10$ $m L$ $o f$ $O_{2}$

$5$ $m L$ $o f$ $O_{2}$

$2 H_{2} + O_{2} \to 2 H_{2} O$
Combining volume ratio of $H_{2}$ and $O_{2}$ $= 2 : 1$
Here $H_{2}$ is limiting reactant. $30 m l$ of $H_{2}$ will react with $15 m l$ of $O_{2}$ and $5 m l$ of $O_{2}$ will remain unreacted at the end.

Q. If 30 mL of H2​ and 20 mL of O2​ react to form water, what is left at the end of the reaction?

10 mL of H2​

5 mL of H2​

10 mL of O2​

5 mL of O2​