An iron ore sample weighing 0.8765 g is dissolved in HCl(aq) the the iron is obtained as Fe2+(aq). This solution is then titrated with 29.43 mL of 0.04212 M and requires 26.24 mL K2Cr2O7(aq). Calculate the % Fe, by mass, in the ore sample. (Hint: This is a redox reaction occurring in an acidic medium; write a balanced equation for this reaction)
Hard water stains are caused by minerals and metals that are disolved in the water collecting on surfaces. A metal pipe would make it worse. Thats like adding gasoline to a fire to put it out.
Maybe if you had a small current running thru the copper pipe too, but LOL, no copper pipe will not prevent hard water stains.or else my house wouldn't have that problem as all pipes are copper.
please help with this question Silver becomes tarnished in houses because of the presence of small amounts of hydrogen sulphide. The reaction that takes place is the following: 4Ag(s) + 2H2S(g) + O2(g) →2Ag2S(s) + 2H2O(aq) If 18.5 g of Ag is in contact with 4.55 g of H2S, determine the mass of Ag2S formed
6Fe2+ + Cr2O7^2- 14H+ ------- 6Fe3+ + Cr3+ + 7H2O Moles of Fe2+ 6 x moles of Cr2O7^2- 6 x 0.04212M x 0.02624L 0.006631 mole Hence mass of Fe2+ 0.006631 mole x 55.847g/mol 0.3703g %Fe (0.3703/0.8756) x 100 42.30%
