[APPLE]

Can anyone solve this two problems ?
1.The sample containing hydroxide, carbonate and  sulfate of Ca (calcium) weighs 31 g. It was treated with dilute hydrochloric acid. This released 2.24 dm3 of gas, leaving 13.6 g of undissolved residue. Determine the mass of the components of this sample.
2.the unlabeled reagent bottles contain sodium carbonate, calcium carbonate, barium sulphate, sodium chloride and sodium sulphate, how with distilled water, dilute HCl and barium chloride solution can determine what is in which reagent bottle.Show with reactions with aggregate states.
THANK YOU SO MUCH!!!!!

[AWK]

First of all, read https://www.chemicalforums.com/index.php?topic=65859.0.
1. Solvable without a calculator - start with an insoluble residue.
2. Solvable - you have two groups of compounds - one group (3 compounds) soluble in water, the other group - insoluble. Check reactions with hydrochloric acid of all compounds and reactions with barium chloride of clear solutions after acidification.

[APPLE]

Thank you,
So CaSO4 is insolubale and it’s 13,6 but how with carbonate and hydroxide?

[AWK]

Why do you have information about released carbon dioxide?

[APPLE]

Oh thank you so much, i got from proportion 10g for CaCO3, 13,6 for CaSO4 and [31-(10+13,6)=7,4]for Ca(OH)2