Question

When a strong acid and a strong base are mixed, the heat released is maximum in the case of

• A. 20 ml of 0.1 M-HCl + 20 ml of 0.1 M-NaOH
• B. 25 ml of 0.1 M-HCl + 25 ml of 0.1 M-NaOH
• C. 10 ml of 0.1 M-HCl + 40 ml of 0.1 M-NaOH
• D. 35 ml of 0.1 M-HCl + 15 ml of 0.1 M-NaOH

Answer 1

The correct option is B

25 ml of 0.1 M-HCl + 25 ml of 0.1 M-NaOH

Greater the mill equivalents of strong acid and strong base, higher is the heat liberated.

25 ml of 0.1M HCl=NV=.1X25=2.5milli equivalentssdf

25 ml of 0.1M NaOH=NV=.1X25=2.5milli equivalents, as both have same milli equivalents the heat liberated is more,in other options the milli equivalents are less.