A student attempted to identify an unknown compound by the method used in the experiment. She found that when she heated the sample weighing 0.4862g, the mass barely changed, dropping to 0.4855g. When the product was converted to a chloride, the mass went up to 0.5247g. Is the sample a carbonate? What are the two compounds that might be the unknown?

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koikkara · Answer

Hai Sweet Friend, @Bhaught20  WelcoMe To OpeN studY !!

Since their chlorides would weigh less than the starting carbonate, Barium and calcium carbonate are too much away that it can't be an alkali metal carbonate. Also, the  Scandium carbonate Sc2(CO3)2 comes just close to the  value  0.5247 g. Unlike them, SrCO3, which  gives a chloride weighing 0.5214 too.

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