A sample of an iron ore was prepared for Fe3+ analysis as following: 3.4g of the sample was added and dissolved in acid environment then diluted to 250 mL using volumetric flask. After that, 10 mL of the resulting solution was transferred by pipet to a 50-mL volumetric flask and continue to be diluted. The scientists found out that this solution gives the concentration of Fe3+ as 2.3 mg/L. Find the weight percentage of Fe3+ in the original sample.

Q: A solution may contain Ag+, Pb2+, and/or Hg22+. A white precipitate forms on addition of 6 M HCI.…

A: 1.  Formation of a white precipitate upon addition of 6 M HCl Adding 6 M HCl to a solution…

Q: What are the products of the following decomposition? Ni(CIO3)2 -->

A:

Q: Explain why addition of NH3 or HNO3 to a saturated solution of Cu(OH)2 in contact with solid Cu(OH)2…

A:

Q: Consider the reaction: Cu2+(aq) + 4NH3(aq) 2 Cu(NH3)4²*(aq) Kf= 1.7x 1013 What is [Cu2*] remaining…

A: Answer: This question is based on the equilibrium concentration of an ion due to dissociation of a…

Q: For Cd(OH)2, Ksp = 5.9 × 10–15. For [Cd(CN)4]2– Kf = 3 × 1018. What is the molar solubility of…

A:

Q: Why is Fe2+ used as an electron donor chiefly in acidic environments?

A:

Q: What is the safest way to provide S2- ions in a chemical reaction? React a metal salt with thiourea…

A: Sulfides of IA group elements act as a good source of S2- ion.

Q: Calculate the Ksp of copper (II) sulfide if 2.0 x 10-¹7 g of the compound dissolves in 1.0 L of…

A: Balanced equation: CuS (s)   =   Cu2+ (aq)  +  S2-(aq)                      s                   s…

Q: 1. Write a balanced net ionic equation for the reaction between iron (III) nitrate and sodium…

A:

Q: What type of reation is; 2 Al + 3 FeCl2 ® 2 Fe + 2 AlCl3? 1) Double replacement      2) Simple…

A: We have to tell what type of reaction it is .

Q: If 2.50 g of CuSO4 is dissolved into 9.0 x 10² mL of 0.30 M NH3, what are the concentrations of…

A: The objective of the question is to find the concentration of Cu2+, [Cu(NH3)4]2+, and NH3 in the…

Q: QUESTION 6 What is the oxidation number on the transition metal in the following compound? Be sure…

A: 6. Given compound,   Ca[Pt(H2O)2(C2O4)2]

Q: What is the percentage of Nickel in an ore if, when analyzed by the cyanide method, 20.00mL of KCN…

A: To find the percentage of nickel in the ore using the cyanide method, use the reaction between…

Q: solution containing copper(II) nitrate (aq) first has some aqueous ammonia added to it. A white…

A: The question is based on the concept of qualitative analysis. to identify the copper ions in the…

Q: How many moles of Ag can be obtained from 2.43 moles Cu using yhe following balanced reaction.…

A:

Q: When Mn2+ is mixed with sodium bismuthate, what reaction occurs?

A: The reaction is as follows:

Q: Pb(NO3)2 + Ni(en)1(H20)4SO4 ------> Pb(SO4)(s) + 2NO31- + Ni2+ + 4H2O + 1 en b. How many grams of…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: A student set up the reaction with 0.048 M Fe3+ and 1.0x10-4 M SCN. They end up with an equilibrium…

A: Answer: Value of equilibrium constant is equal to the ratio of molar concentrations of products and…

Q: Adding excess NH3 to Co(H2O)62+(aq) produces ___.  Co(H2O)62+(aq) + 6 NH3(aq) →   Question 17…

A: The reaction in question is a ligand substitution reaction. In this reaction, the water molecules…

Q: Write and equation for the addition of KI to Ag+(aq) + 2NH3(aq) [Ag(NH3)2]+(aq)

A: Le Chatelier principle says that equilibrium will shift in such a direction so as to undo the effect…

Q: To analyze the amount of iron (Fe; Mw =  55.85 g/mol) contained in an ore sample, the sample was…

A: Given in the question, Volume of EDTA = 25 ml Molarity of EDTA = 0.2922 M Total moles of EDTA =…

Q: 1. Sodium oxalate crystals (0.1234 g, MM=134) required 15.67 ml of KMNO, solution to titrate. Find…

A: the solution is as follows:

Q: What would you use to prove that copper is reduced in the following reaction? Fe)+CaSO → FeSO (46)…

A: