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- 1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in concentrated HCl, giving a mixture of Fe²+ and Fe+. After adding HNO3 to oxidize any Fe2+ to Fe+, the resulting solution was diluted with water and the Fe precipitated as Fe(OH)3 by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g of pure Fe2O3. Calculate the: a) % (w/w) Fe b) % (w/w) Fe;O4 in the sample.CoBr VF, FECOWhat tests would you use to identify a solution of FeCl3?
- What is the oxidation state of Cl in CaOCl2 ?1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in concentrated HCI, giving a mixture of Fe2+ and Fe³+. After adding HNO3 to oxidize any Fe2+ to Fet, the resulting solution was diluted with water and the Fe+ precipitated as Fe(OH)3 by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g of pure Fe2O3. Calculate the: a) % (w/w) Fe b) % (w/w) Fe;O4 in the sample.If an unknown solution forms a white precipitate when silver nitrate is added, what two possible ions might it contain? CO, ce What chemical test could you do to distinguish between these two possibilities?
- (ii) Br NH HNO₂ H2SO4When solid Fe metal is put into an aqueous solution of NiSO4, solid Ni metal and a solution of FeSO4 result. Write the net ionic equation for the reaction. (Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds.)93 Chemistry I Laboratory Manual, 2019 Revision Questions: gy muibor alo vialom od W (E 1) Samples containing iron(II) ion can be titrated with solutions containing dichromate ion under acidic conditions. OCHS Cr2072- + 6Fe2+ + 14H* → 2Cr+ + 6Fe3+ + 7H2O itio (a) Which ion is oxidized in this reaction? (b) Which ion is the reducing agent in this reaction? ry nistry ple. (c) If a 1.924 g sample containing iron(II) sulfate is dissolved and requires 36.1 mL of 0.0100 M K2Cr2O7 solution to titrate it, what is the percent iron(II) sulfate in the at sample? routine tiration de enin rntory skills on of sodiu de KH ph pu that the
- When iron rusts it forms Fe 2O 3. Name this product of air oxidation.Write a balanced net ionic equation between CaCl2.2H2O and KOHA 0.8040-g sample of an iron ore is dissolved in acid. The iron is then reduced to Fe²+ and titrated with 47.22 mL of 0.02242 M KMn 04 solution. Calculat the results of this analysis in terms of % Fe (55.847 g/mol).