Iron(iii) ions, fe3+ , react with thiocyanate ions, scn- , in a reversible reaction to form a red solution. which changes to the equilibrium will make the solution go red? i. increasing the temperature ii. adding fecl3 iii. adding a catalyst a. i and ii only b. i and iii only c. ii and iii only d. i, ii and iii

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 .