Question

Hello, i did a lab where i was given a sample of contaminated water and must determine the identity of the metals and must percipitate one out. I was able to determine the identity of metal Y which is aluminium and metal X which is lithium. Im confused on part 3 though. lithium and alumnium are soluble in almost anything and i cant use hydroxide or carbonate since lithium is in there, some help please! I would also like to know how i would calculate question no.7.

Quality Summative Steps You have been given a water sample that has a saturated amount of two possible nitrates. One nitrate will be group I nitrate (XNO3) and another nitrate Y(NOs). In this experiment you will be designing an experiment to determine which metals are present in your sample. The following metals could be present in your sample. bive Sodiam Potassfum yell ow Lithium Cafclum Magnesium Aluminum Copper Siver Zinc PART 1: Determine the unknown metals present. 1. Using your knowledge of single displacement reactions and a spot plate, to determine the identity of unknown metal Y. Identity of Y:ukinium course dropbox by end of the period. Provide photographic evidence + observation table. Upload photos to 2. Using your knowledge of flame tests, confirm the metal present in the sample. Please use http://en.wikipedia.org/wiki/Flame test to help you to identify your metal. Identity of X: tA OM Upload photos to course dropbox by end of the period. red Use the identity of Y to choose an ionic compound reactant that it will precipitate with completely 4. Write a balanced chemical equation using the reactant chosen in 3. Provide photographic evidence + observation table 3. PART 2: Research- Done IN-CLASS Using the metals in your sample and the map provided research locations in Canada that are potential point source polluters for your contaminated water. Show teacher hand-written research notes 5. PART 3: Precipitation reaction 6. Selectively precipitate out unknown metal Y assuming that the concentration of your unknowns are saturated solutions at 20°C. See https://en.wikipedia.org/wiki/Solubility table for information on specific nitrate salts. Saturated solution at 20°C of unknown Y(NO3)x Y(NOs) a) Write a total ionic chemical equation using the reactant described in # 4 b) Write a net ionic chemical equation using the reactant described in #4 c) List the spectator ions (mol/L) Calculate mass of reactant required to fully precipitate your unknown metal Y assuming that you have been given 25 mL of saturated solution. 7.

Answer 1

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