Answers

2016-02-25T23:07:44+05:30
This is because Mg is small than Ba therefore as the particle is bigger BaSO4 form precipitate 
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2016-02-26T20:01:51+05:30
BECAUSE Mg IS SMALLER THAN Ba 
      HENCE,THE PARTICLES ARE BIGGER THAN BaSo4.
              SO,THEY ARE SOLUBLE IN WATER.
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