You are given a solution, which contains any or all of the i…
You are given a solution, which contains any or all of the ions shown below. You performed the following tests on separate portions of this solution with the indicated results. Based on this information, mark each ion below as P (present), A (absent), or U (undetermined). Reagents Added –> Observations (a) Solution was turned basic with NH3 followed by the addition fo 2 drops of catechol violet reagent –> Solution formed a white, jelly-like precipitated and the then turned blue-green in color. (b) Solution was acidified with 4M HNO3 followed by the addition of 0.1M AgNO3 –> White precipitate formed (c) Concentrated ammonia is added –> Solution appears clear, colorless (d) Solution was acidified with 4M HNO3 followed by the addition of (NH4)2MoO4 and heat –> Yellow precipitate formed Fe3+ [unknown1] Cu2+ [absent2] Al3+ [present3] Cl- [present1] SCN- [unknown2] CO32- [unknown3] SO42- [unknown4] PO43- [present2]
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Answer the following questions by writing the correct answer in the blanks. Potassium is an element in which group (group name, not number)? [alkalimetal1] Oxygen is an element in which group (group name, not number)? [chalcogens1] Give the symbol of the element that is in the fourth period and is a member of Group IIA/2. [calcium1] In regards to reactivity, which of the following elements (Magnesium, Strontium, Beryllium, or Barium) would you expect to be the most reactive? [barium1]
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