A 0.51960.5196 g solid sample containing a mixture of LaCl3LaCl3 (molar mass = 245.26 g/mol) and Ce(NO3)3Ce(NO3)3 (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO3KIO3, producing the precipitates La(IO3)3La(IO3)3 and Ce(IO3)3Ce(IO3)3. For the complete titration of both La3+La3+ and Ce3+Ce3+, 42.9942.99 mL of 0.12970.1297 M KIO3KIO3 was required. Calculate the mass fraction of LaLa and CeCe in the sample.

Q: 1.736 g of iron ore is dissolved with acid and precipitated as Fe2O3X.H2O. After the precipitate is…

A: The percentage of the Iron in the sample of iron ore can be calculated as:

Q: A 1.500 g sample containing only BaO (153.3 g/mol) and CaO (56.08 g/mol) was analyzed for its Ba and…

A: Let the mass of BaO in the sample be x g⇒ mass of CaO = (1.5-x) gNumber of moles of BaO in sample=x…

Q: The phosphorus in a 0.2222-g sample was precipitated as the slightly soluble (NH4)3PO4 • 12Mo O3.…

A: P2O5 = 2 (NH4)3PO4 • 12Mo O3 = 24 PbMoO4   Moles of PbMoO4 are, Moles = mass ÷ molar mass Moles =…

Q: 1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in…

A: Amount of Ore obtained Fe=0.8525g Reaction involved  Fe3O4 + 8HCl ----------   Fe+2+2Fe+3 4Fe3O4  +…

Q: 3.00- g sample of an alloy of Pb Lead was dissolved in nitric acid (HNO3). Sulfuric acid was added…

A: First Calculate mole by dividing Molar mass to the mass  Then use mole -mole relationship to get…

Q: In the laboratory you are given the task of separating Ag" and Co" ions in aqueous solution. For…

A: If either of the given ions forms a precipitate on reaction with the reagent to the mixture then the…

Q: A 1.6394-g sample of limestone taken from Sinuhutan Cave in Brgy. Onop, Miagao was analyzed for Fe,…

A: ib

Q: A small iron pan was analyzed by dissolving a 11.1321 g sample in HCl. The resulting solution was…

A: Given, mass of Fe3O4 = 5.1231 g molar mass of Fe3O4 = 231.533 g/mol !! Calculate the moles of Fe3O4…

Q: When aqueous solutions of K₂SO4 and CrCl3 NiBr2 and AgNO3 Li₂CO3 and Csl O Nal and KBr O KOH and…

A: In a double displacement reaction if one of the product is soluble and another is insoluble then…

Q: An iron ore was analyzed by dissolving a 1.957-g sample in concentrated HCl. The resulting solution…

A:

Q: Aluminum in an ore sample is determined by dissolving it and then precipitating with base as Al(OH)3…

A: Given, 0.2385 g of precipitate

Q: The phosphorus in a 0.2091-g sample was precipitated as the slightly soluble (NH4)3PO4 • 12 MoO3.…

A: Given Mass of PbMoO4 = 0.2922 gram Total yield of sample  = 0.2091 gram We have to calculate the…

Q: In the laboratory you are given the task of separating Ag" and Co* ions in aqueous solution. For…

A: Given Ag+ and Co2+   Y or N Reagent Formula of precipitate if yes  1   K2S   2   KBr   3…

Q: 5.  A 0.8102-g sample of impure Al2(CO3)3 decomposed with HCl; the liberated CO2 was collected on…

A: In the Question- 5 we want to determine the percentage of Al in the sample.  You can see details…

Q: A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 mL of 1.00…

A: Mass of sample = 0.750 grams Volume of HCl added = 25.0 mL Concentration of HCl added = 1M Volume of…

Q: An iron ore was analyzed by dissolving a 2.9912-g sample in concentrated HCl. The resulting solution…

A:

Q: An iron ore was analyzed by dissolving a 2.9912-g sample in concentrated HCI. The resulting solution…

A: Molar mass of Fe3O4 - 231.533 g/mol Given, 2.9912 g of ore sample. Fe2O3 obtained - 0.8394 g.

Q: 3) A mixture of 80.0 g of chromium (VI) oxide, Cr2O3, and 8.00 g of solid carbon, C, is used to…

A: Number of moles=Given massmolar massGiven mass of Cr2O3=80.0gmolar mass of Cr2O3=(52*2+16*3) g/mol…

Q: Calculate the theoretical yield of MgCl2 in moles when 0.326 grams of MgO are reacted with 30.4 mL…

A:

Q: The aluminum in a 1.520-g sample of impure ammonium aluminum sulfate was precipitated with aqueous…

A: Given data : Mass of sample = 1.520 g  Mass of Al2O3 = 0.2001 g

Q: The mercury in a 1.9458 g sample was precipitated as Hg5(IO6)2  by treatment with an excess of…

A: Given  mass of sample = 1.9458 g mass of precipitate Hg5(IO6)2 = 0.5218 g    Required data -…

Q: A chemist dissolves a 1.497-g sample of a type of metal (an alloy of Sn, Pb, Sb, and Cu) in nitric…

A: Yield is defined as the amount produced during a reaction. It means that yteld is nothing but the…

Q: One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(I) hydroxide…

A:

Q: In the laboratory you are given the task of separating Ba2+ and Zn²+. ions in aqueous solution. For…

A: Ionic compounds termed as salts dissolve greely in water. In certain cases, the solubility of a salt…

Q: A sample of magnetite  (impure Fe3O4) weighing 0.4500 g is fused with oxidizing flux and the ferric…

A: Magnetite is an ore of Fe with the formula Fe3O4

Q: A 0.4550-g solid mixture containing CaCl2 is dissolved in water and treated with an excess of…

A: Given information,    0.4550-g solid mixture containing CaCl2 is dissolved in water and treated with…

Q: In the laboratory you are given the task of separating Ca2+ and Zn2+ ions in aqueous solution. For…

A:

Q: A 12.63 g sample of calcium ore was dissolved in HCI and gravimetrically analyzed, through the…

A: Answer: These question are based on the stoichiometric calculation, where by calculation the moles…

Q: 3.77 g of potassium is placed in 375 ml of 0.850 mol/l chromium (iii) nitrate solution as follows 3…

A:

Q: QUES A certain compound was known to contain calcium and chlorine. A sample that weighed 2.78g was…

A: Mass of sample taken = 2.78 g Mass of CaO formed by decomposition of calcium oxalate = 1.40 g

Q: A 0.8761 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

A:

Q: An iron ore was analyzed by dissolving a 2.9912-g sample in concentrated HCI. The resulting solution…

A:

Q: a. In the laboratory you are given the task of separating Ca2+ and Pb2+ ions in aqueous solution.…

A: To answer questions regarding separation of ions.

Q: In the laboratory you are given the task of separating Ag* and Fe* ions in aqueous solution. For…

A: Inorganic cations can be separated using different reagents. For the separation of Ag+ and Fe2+, the…

Q: 3. Consider the nickel salt: (NH4 )2Ni(SO4 )2 ·y H2O (Ammonium Nickel Sulfate Hydrate), where y is…

A:

Q: An iron ore was analyzed by dissolving a 2.9912-g sample in concentrated HCI. The resulting solution…

A: Given: Mass of ore sample used = 2.9912 g. And mass of Fe2O3 obtained = 0.8394 g.

Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3,…

A: The hardness of water (hardness count) is usually expressed in parts per million (ppm)  (by mass) of…

Q: A 0,4500 g sample of a pesticide (DDT, C14H9Cl5, MM 354,49 g mol^-1) was decomposed with metallic…

A: Given that : Mass of sample of pesticide (DDT, C14H9Cl5) = 0.4500 g Molar mass of pesticide…

Q: An iron ore was analyzed by dissolving a 2.9912-g sample in concentrated HCl. The resulting solution…

A: The mass of the pure Fe2O3 is given as 159.69 g/mol The atomic mass of Iron is 55.847 g/mol The…

Q: After 1,600 grams of an aluminum sulphate sample is dissolved in water, aluminum is precipitated in…

A:

Q: Question in image

A: (a) The volume of the average titer is 15.65 mL or 0.01565 L. The number of moles of triiodide ion…

Q: 0.9545 g of calcium nitrate salt, Ca (NO3) 2, is weighed, dissolved in concentrated HCl solution and…

A:

Q: In the laboratory you are given the task of separating Cat and Ag* ions in aqueous solution. For…

A: A precipitation reaction is the reaction with the formation of an insoluble salt when two soluble…

Q: It is known that when mixed in solution aqueous, silver ions will react with chloride ions to form…

A: The balance chemical equation for a reaction when AgNO3 and KNO3 are mixed with concentrated KCl…

Q: 3.77 g of potassium is placed in 375 mL of 0.850 mol/L chromium (III) nitrate solution as follows 3…

A: Limiting reagent: The reactant that completely used up in the reaction is known as limiting reagent.…

Q: In the laboratory you are given the task of separating Ca²* and Co²* ions in aqueous solution. For…

A: Given

Q: A 0.8571 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

A: The mass of the iron ore sample is = 0.8571 g The mass of iron(III) oxide is = 0.1132 g The molar…

Q: 5. A 0.5664 g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in…

A:

Q: what mass of precipitate (in g) is formed when 45.5L of 0.300 M Na3PO4 reacts with 59.0 mL of 0.200…

A: Na3PO4 ; Volume = 45.5L  Molarity = 0.300 M = 0.300 mol/L * Moles of Na3PO4 = 45.5 L × 0.300 mol/L =…

Q: 1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in…

A: A numerical problem based on isolation of metals, which is to be accomplished.

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".