The alkaline earth elements are in Group 2 of the Periodic Table. On this experiment Be, Mg, Ca, Ba, and Sr will probably be studied. All of the alkaline earth metals are M2+ cations (Mg2+, Ca2+, and so on.) after they mix with nonmetals in ionic compounds and after they are in aqueous answer. The reactivity of the cations of beryllium, barium, calcium, magnesium, and strontium will probably be examined. The steel cations will probably be reacted with water. The data will probably be used to rank the reactivity of the steel cations.
If an answer containing one of these cations is combined with an answer containing an anion, the alkaline earth salt will precipitate if the compound containing these two ions is insoluble. The anions used for testing the alkaline earth cations in this experiment is OH
M(s) + H2O(l) ¾® M(OH)2(s) + H2(g)
The solubilities of the compounds of the alkaline earth cations and the anions present a easy development in keeping with the order of the cations in the Periodic Table. That’s, as we go from one finish of the alkaline earth household to the different, the solubilities of the hydroxide salts both progressively enhance or lower. By figuring out the solubility tendencies in this experiment, the order of the alkaline earths in the Periodic Table will be capable to be confirmed.
Pre-Lab Project
As preparation for this experiment, do the following:
® Open the prelab folder on Blackboard for this experiment and observe the directions to organize for this experiment.
® Watch the video in the folder. Use to fill in the knowledge sheet and reply the questions.
Process tailored from Slowinski, et al, Chemical Rules in the Laboratory.
Periodic Traits in Group II
Report Sheet
Identify: _____________________________ Part: _________
Teacher: ____________________________ Date: __________
Decide the Reactivity of Alkaline Earth Salts
Table 1 – Observations of reactivity of Alkaline Earth Salts
Metallic
Describe the response with water.
Be
Mg
Ca
Sr
Ba
Order of reactivity from most reactive to least reactive:
Is the knowledge in keeping with the order of the Group 2 elements on the Periodic Table?
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AtHome-Measure
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The alkaline earth elements are discovered in Periodic Table Group 2. Be, Mg, Ca, Ba, and Sr will probably be investigated in this experiment. When alkaline earth metals mix with nonmetals in ionic compounds and in aqueous answer, all of them grow to be M2+ cations (Mg2+, Ca2+, and so on.). The reactivity of beryllium, barium, calcium, magnesium, and strontium cations will probably be investigated. Water will react with the steel cations. The knowledge will probably be used to rank the steel cations’ reactivity.
If one of these cations is combined with an anion in an answer, the alkaline earth salt will precipitate if the compound containing these two ions is insoluble. The anions used in the alkaline testing
