What is the colour of barium chloride solution?
The barium chloride solution is colorless.
If both are in solutions, barium sulfate would precipitate out of the solution - unless if the barium chloride solution is dilute enough that only a small amount of barium sulfate will form, thus remaining soluble in the solution. The remaining sulfate will remain in the solution as wellas sodium and chloride.
Barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride?
Barium chloride reacts sodium sulfate in aqueous solution to give soluble sodium chloride and insoluble barium sulfate how would you isolate the barium sulfate?
I assume you mean 0.5 molar, but I'll go with what I'm given. If you have 500 molar of barium chloride, you will have 1000 molar of chloride ions as there are 2 chlorides for every 1 molecule of barium chloride. Having the 100ml there is irrelevant as you are talking about concentration and didn't ask for moles.