1. Can calcium hydroxide solution be used to distinguish Co(NO3)2 and Fe(NO3)3 solutions using only the titration technique presented in this lab? Justify your answer with an explanation.
2. a student added 150 mL of water to the beaker containing 10 mL of unknown metal nitrate solution instead of 100 mL of water as instructed? Will this experimental error signi?cantly affect the volume of NaOH that must be added in the titration? Justify your answer with an explanation.
3. If a student used an iron scoopula, instead of a plastic one, to add the unknown metal to the HCl solution, will it affect the calculated molar mass of the unknown metal? If so, how? Justify your answer with an explanation.
4. 90.0 mL of distilled water is added to 10.0 mL of 1.00 M HCl. Calculate the [H3Oþ] and the pH of the solution before any metal has been added to the solution.
Calculate the [H3Oþ] and the pH of the solution after 99.0% of the H3Oþ has reacted with and unknown metal