Find the AH° for the reaction of two moles of aqueous ammonium hydroxide and one mole of aqueous calcium chloride that produces two moles of aqueous ammonium
chloride and one mole of solid calcium hydroxide.
2NH4OH(aq) + CaCl2(aq) 2NH4Cl(aq) + Ca(OH)2(s)

A) -31.04kJ

B) -1585.41kJ

C) -67.2kJ

D) -3103.61kJ

E) -1518.2kJ

Jenny places a strip of ph paper into a solution. when she removes the ph paper, it has turned yellow-green. what should jenny do next to determine the ph of her solution? a. use a different testing method because the ph paper should not change colors b. place the ph paper into a machine that reads the ph of the solution c. compare the ph paper's color with the color of ph paper from another solution d. compare the ph paper's color with a chart of colors and ph ranges