and Group 7A lons t to Identify Group 2A Part A: Relative Solubilities of Group

Question

and Group 7A lons t to Identify Group 2A Part A: Relative Solubilities of Group 2A Salt Observations For each combination o f reactants mixed togeth her, record whether or not a precipitate was so record any distinguishing characteristics of the precipitates. 1 M Na CO 0.25 M (NH4)2C204 1 M H2S04 0.25 M (NH.)O 1M Acetic Acid Ba(NO3)2 PPT Ca(NO3)2 PPT NKPPI O PPT Sr(NO3)2ign+ Analysis 1. PPT Based on your results in the table above, list the four alkaline earth metal cations in o the solubility of the salts formed. Then clearly explain how you determined this order least soluble most soluble Does solubility increase or decrease going down the group?

Explanation / Answer

1.The solubility of nitrates of alkaline earth metals decreases down the group.

2.Ba(NO3)2 (most soluble) > Ca(NO3)2 >Mg(NO3)2>Sr(NO3)2 (least soluble)

comparing the ppt formed in different acid we can understand the trend.

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