[Camouflage]

1) What's the mass Al2(SO4)3 required in grams to create a solution of 250 mL that has the same SO4- Concentration as a solution that contains 1,4205 grams of Na2SO4 in 100 mL?

Ar(Al)= 26,92 Ar(S)= 32,07 Ar(Na)= 22,99 (Ar of Oxygen not given therefore cannot be used)


2)If we add 1 mL of a solution of HNO3 C=4M  in a sediment that consists of 8,7 mg CdS and 5,2 mg Bi2S3 find the percentage of the acid that will be consumed for the dilation of the sediment?



Ar(Cd)=112,41 Ar(S)=32,07 Ar(Bi)=208,98

Please be as clear and explain as good as possible thank you

[Borek]

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