In the titration the student used 25.0 cm3 of sodium hydroxide. This volume reacted with exactly 20.0 cm3 of 0.1 mol/dm3 sulfuric acid solution.

The equation for the reaction is:

2NaOH + H2SO4 → Na2SO4 + 2H2O
What is the concentration in mol/dm3 of the sodium hydroxide solution?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .