Question

How many moles of H2o form when 25.0 mL of 0.10 M HNO3, solution is
completely neutralised by NaOH?
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Answer 1

Answer: 2.5 milli moles

Explanation: MOLARITY = no of moles/volume...............(1)

(as volume is given in moles we get no of moles in milli moles)

Given, molarity=0.1M volume=25 ml

from (1)

no of milli moles = (Molarity)(volume)

= (0.1)(25)

=2.5 milli moles

from equation

HNO3+NaOH⇒NaNO3+H2O

1mole of HNO3 gives 1 mole of H2O

2.5milli moles of HNO3 gives 2.5 milli moles of H2O

so, No .of moles of H2O = 2.5 milli moles