A titration reached the equivalence point when 17.0 mL of was added to of NaOH (aq) of unknown concentration. What is the concentration (M) of this unknown NaOH solution? H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l)

This is an incomplete question, here is a complete question.

A titration reached the equivalence point when 17.0 mL of 0.211 M H₂SO₄ (aq) was added to 16.3 mL of NaOH (aq)  of unknown concentration. What is the concentration (M) of this unknown NaOH solution?

Answer : The concentration (M) of this unknown NaOH solution is, 0.440 M

Explanation :

To calculate the concentration of unknown NaOH solution, we use the equation given by neutralization reaction:

where,

are the n-factor, molarity and volume of acid which is

are the n-factor, molarity and volume of base which is NaOH.

We are given:

Now put all the given values in above equation, we get:

Therefore, the concentration (M) of this unknown NaOH solution is, 0.440 M

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.