Which of the following claims may be made based on your observations? (You will recieve negative points for wrong answers.)

(A) If the chloro complex is a product, then the reaction must be exothermic.
(B) The chloro complex is favored by cooling.
(C) The chloro cobalt complex is pink and the aqua cobalt complex is blue.
(D) If the chloro complex is a product, then the reaction must be endothermic.
(E) The chloro complex is favored by heating.
(F) The chloro cobalt complex is blue and the aqua cobalt complex is pink.

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What element has similar physical and chemical properties as boron.