Question

Equal volumes of 1M HCl& 1M $H_{2}S{O}_4$ are neutralized by 1M NaOH solution and x & y KJ/equivalent of heat are liberated respectively. Which of the following relations is correct?

• A. x = 2y
• B. x = 3y
• C. x = 4y
• D. x = 1/2 y

Answer 1

The correct option is D

x = 1/2 y

We can clearly see that, $H_{2}S{O}_4$ gives 2 moles H+ while HCl gives 1 mole H+ from 1 mole after ionization. Hence, $H_{2}S{O}_4$ will release double amount of heat as compared to HCl,

$\therefore$ y = 2x
$\therefore$ x = 1/2 y