(i) Silver tarnishes in the presence of hydrogen sulfide (produced by rotten eggs) and oxygen because of the reaction below: 4Ag + 2H2S + O2 → 2Ag2S + 2H2O How many grams of Ag2S could be obtained from a mixture of 0.95 g Ag, 0.140 g H2S and 0.08 g O2 ? (ii) At 20°C the solubility limit of silver(I)sulfate (Ag2SO4) is 0.800 g/100 mL. What is the molarity of such a solution? (iii) What volume in mL of concentrated H2SO4 (18.0 M) must be used to prepare 400 mL of 3.0 M H2SO4 solution?
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- (i) Silver tarnishes in the presence of hydrogen sulfide (produced by rotten eggs) and oxygen because of the reaction below: 4Ag + 2H2S + O2 → 2Ag2S + 2H2O How many grams of Ag2S could be obtained from a mixture of 0.95 g Ag, 0.140 g H2S and 0.08 g O2 ?
(ii) At 20°C the solubility limit of silver(I)sulfate (Ag2SO4) is 0.800 g/100 mL. What is the molarity of such a solution?
(iii) What volume in mL of concentrated H2SO4 (18.0 M) must be used to prepare 400 mL of 3.0 M H2SO4 solution?
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