Graded Assignment
Lab Report
Answer the questions below. When you have finished, submit this assignment to your teacher by the due date for full credit.
(5 points)
1. Which combinations of substances resulted in a chemical change?
Answer: The noticeable chemical changes were in these mixes:
Ammonium Vanadate mixed with both ammonium hydroxide and hydrochloric acid had less color than the control, which was yellow. Manganese sulfate mixed with ammonium hydroxide produced an orange color. While mixed with hydrochloric acid, though, it remained clear like the control. The iron nitrate control was orange, while it turned red when mixed with ammonium hydroxide, and yellow when mixed with hydrochloric acid. The cobalt nitrate control was pink, it stayed pink when mixed with hydrochloric acid, it turned teal when mixed with ammonium hydroxide. The copper nitrate control was clear, it was also clear when mixed with hydrochloric acid, it turned blue when mixed with ammonium hydroxide. The zinc nitrate was clear in the control and when mixed with hydrochloric acid. It appeared to harden somewhat and gain a crystal-like appearance when mixed with ammonium hydroxide.




(5 points)
2. For each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table.
Answer: Ammonium Vanadate appears to be mostly a post transition metal. Manganese sulfate also has more post transition atoms than transition atoms. Iron nitrate is a transition metal. The cobalt nitrate is a transition metal. Copper nitrate is a transition metal. Zinc nitrate is also a transition metal.




(5 points)
3. Were there any metallic compounds that did not react with either the acid or the base? Write the type of metal, based on your examination of the periodic table.
Answer: Potassium nitrate did not react at all, it is an alkali metal. Calcium nitrate also did not react and it is an alkaline earth metal.






(5 points)
4. Make a general statement about the reactivity of the metals in this experiment.
Answer: The transition metals in this experiment were all reactive when mixed with one of the two substances. The alkali and alkaline earth metals, however, did not react at all.