just many chemistry questions for chemistry professionals THE ANSWERS R IN VOGEL'S PRACTICAL CHEMISTRY HELP ..

Question

first y silver sulphate is soluble in dil nitric acid..
second why silver thiosulphate is soluble in excess thiosulphate
third no ppt is formed when bacl2 reacts with sulphides
fourth why white ppt of baso3 sol in dil hcl on warming with h2o2 the ppt is oxidized to baso4
fifth y baso4 is insoluble in dil hcl
sixth why no ppt formed when thiosulphate reacts with bacl2 except from concentrated solutions...
seventh y red colour of fe2so3 turns reddish brown on boiling?
eight y purple colour of complex ferric thiosulphate fades rapidly and disappears by boiling
ninth decoulirization of iodine occurs when reaction of iodine with sulphide,sulphite,thiosulphate yet -ve with sulphate
tenth same ninth question if reaction with dichromate or permengante

IF NO ONE KNOWS THE ANSWER JUST CAN U TELL ME A WEBSITE...OR IF U HAVE VOGEL'S PRACTICAL CHEMISTRY TEXT BOOK THE ANSWERS R THERE

Answer 1

1. I think you mean silver thiosulfate. HNO3 oxidizes S2O3= to 2SO4=, and Ag2SO4 is slightly water soluble.
2. Ag2S2O3 forms a water-soluble complex, Ag(S2O3)2= in excess S2O3=.
3. BaS is water-soluble.
4. Because the reaction is driven by evolution of a gas from it: BaSO3 + 2HCl ===> BaCl2(aq) + H2O + SO2(g)
5. Because no gas can be evolved.
6.
7. 2Fe+3(aq) + 3H2O ===> Fe2O3(s) + 6H+
8.
9. All of those are reducing agents. I2 + 2e- ===> 2I-
10. Those are both oxidizing agents. I2 ===> IO3- + 5e-

Answer 2

Why is everyone sayin the multi choice was hard - it was beautiful! They were all so easy and there was about 12 repeats such as: 1)What will disolve to produce a basic solution 2)how many mols of iodine are reduced by 1 mol of Permanganate 3)Fe gives a poitive result ith proteins, which compound will likely give the same result 4) 10g of silver is reacted, which of the follwoing is true (like 10th year ina row) 5) Equlibrium question! 6) Feedstock question! 7) Hess's law question! im sure there was more lol but i cant remember however, the calculations were hard, purely becasue the answers that i got just looked like rubbish i got tinnny numbers for most of them??