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A 2.50 g sample of bronze was dissolved in sulfuric acid. The copper in the alloy...
A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A...
A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A solution of potassium iodide was added, which caused the reaction: 2Cu2+(aq) + 5I– (aq) → I3–(aq ) + 2CuI(s) The I3– that formed reacted quantitatively with exactly 29.96 mL of 0.02100 M Na2S2O3 according to the following equation: I3– (aq) + 2S2O32– (aq) → 3I– (aq ) + S4O62–(aq ) What was the percentage by mass of copper in the ore? If the ore...
A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition of the alloy. The scientist takes a 12.502 g sample of the alloy a...
A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition of the alloy. The scientist takes a 12.502 g sample of the alloy and reacts it with concentrated HCI. The reaction converts all of the aluminum and zinc in the alloy to aluminum chloride and zinc chloride in addition to producing hydrogen gas. The copper does not react with the HCI. Upon completion of the reaction, a total of 9.78 L...
Concentrated nitric acid reacts with solid copper to give nitrogen dioxide gas and dissolved copper ions...
Concentrated nitric acid reacts with solid copper to give nitrogen dioxide gas and dissolved copper ions according to the equation: Cu(s) + 4 H+(aq) + 2 NO3 - (aq) → 2 NO2(g) + Cu2+(aq) + 2 H2O(l) Suppose that 6.80 g of copper is consumed in this reaction and that the NO2 is collected at a pressure of 0.970 atm and a temperature of 45 oC. What volume of NO2 is produced?
1. A 0.7336-g sample of an alloy containing copper and zinc is dissolved in 8 M...
1. A 0.7336-g sample of an alloy containing copper and zinc is dissolved in 8 M HCl and diluted to 100 mL in a volumetric flask. In one analysis, the zinc in a 25.00-mL portion of the solution is precipitated as ZnNH4PO4, and subsequently isolated as Zn2P2O7, yielding 0.1163 g. The copper in a separate 25.00-mL portion of the solution is treated to precipitate CuSCN, yielding 0.1931 g. Calculate the %w/w Zn and the %w/w Cu in the sample.
Chromel is an alloy composed of nickel, iron, and chromium. A 0.6445-g sample was dissolved and...
Chromel is an alloy composed of nickel, iron, and chromium. A 0.6445-g sample was dissolved and diluted to 250.0 mL. When a 50.00-mL aliquot of 0.05173 M EDTA was mixed with an equal volume of the diluted sample, all three ions were chelated, and a 5.23-mL back-titration with 0.06139 M copper(II) was required. The chromium in a second 50.0-mL aliquot was masked through the addition of hexamethylenetetramine; titration of the Fe and Ni required 38.95 mL of 0.05173 M EDTA....
A 3.00- g sample of an alloy of Pb Lead was dissolved in nitric acid (HNO)....
A 3.00- g sample of an alloy of Pb Lead was dissolved in nitric acid (HNO). Sulfuric acid was added to this solution, which precipitated 1.69 g of lead sulfate (PbSO.). What is the percentage of lead (Pb) in the sample? (Given the atomic mass of Pb - 207, S =32,0 - 16 gram/mole)
A 0.4505 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid....
A 0.4505 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as SnO2⋅4H2Oand removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot of this solution was buffered, and titration of the lead, copper, and zinc in solution required 35.10 mL of 0.001497 M EDTA. Thiosulfate was used to mask the copper in a second 20.00 mL aliquot. Titration of the...
Metallic copper does not react with hydrochloric acid, but is oxidized by nitric acid since the...
Metallic copper does not react with hydrochloric acid, but is oxidized by nitric acid since the nitrate ion functions as the oxidizing agent in acidic solutions. lf NO and Cu^2+ are formed as products, and the reaction is carried out under standard conditions, E^0 for the reaction of copper metal with nitric acid will be: +0.44 V +0.62 V +0.78 V +0.96 V HNO_3 (aq)+H_2O(l) NO_3^- (aq)+ H_3O^+ (aq) Cu(s)+ NO_3^- (aq) NO(g)+Cu^2+ (aq)
A 0.1362g iron ore sample was dissolved in hydrochloric acid and the iron was obtained as...
A
0.1362g iron ore sample was dissolved in hydrochloric acid and the
iron was obtained as Fe^2+(aq). The iron solution was titrated with
Ce4+ solution according to the balanced chemical reaction shown
below. After calculation, it was found that 0.0238g of iron from
the ore reacted with the cerium solution.
Ce^4+(aq) + Fe 2+(aq) -> Ce^3+(aq) + Fe^3+(aq).
Calculate the mass percent of iron in the original ore sample.
Please round your answer to the tenths place.
Question 7 (2...
Introduction The chemical reactions involved in this experiment are: CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s)...
Introduction The chemical reactions involved in this experiment are: CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s) Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) The copper on the surface quickly reacts with oxygen according to the following reaction: 2Cu(s) + O2(g) → 2CuO(s) Experimental Procedure Dissolve completely about 0.5 to 0.7 g of copper (II) sulphate pentahydrate in about 10 to 20 mL of deionized water. Calculate the amount of zinc powder that must be added to a copper sulfate solution...
A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition of the alloy. The scientist takes a 12.502 g sample of the alloy and reacts it with concentrated HCI. The reaction converts all of the aluminum and zinc in the alloy to aluminum chloride and zinc chloride in addition to producing hydrogen gas. The copper does not react with the HCI. Upon completion of the reaction, a total of 9.78 L...
A 3.00- g sample of an alloy of Pb Lead was dissolved in nitric acid (HNO). Sulfuric acid was added to this solution, which precipitated 1.69 g of lead sulfate (PbSO.). What is the percentage of lead (Pb) in the sample? (Given the atomic mass of Pb - 207, S =32,0 - 16 gram/mole)
Metallic copper does not react with hydrochloric acid, but is oxidized by nitric acid since the nitrate ion functions as the oxidizing agent in acidic solutions. lf NO and Cu^2+ are formed as products, and the reaction is carried out under standard conditions, E^0 for the reaction of copper metal with nitric acid will be: +0.44 V +0.62 V +0.78 V +0.96 V HNO_3 (aq)+H_2O(l) NO_3^- (aq)+ H_3O^+ (aq) Cu(s)+ NO_3^- (aq) NO(g)+Cu^2+ (aq)
A
0.1362g iron ore sample was dissolved in hydrochloric acid and the
iron was obtained as Fe^2+(aq). The iron solution was titrated with
Ce4+ solution according to the balanced chemical reaction shown
below. After calculation, it was found that 0.0238g of iron from
the ore reacted with the cerium solution.
Ce^4+(aq) + Fe 2+(aq) -> Ce^3+(aq) + Fe^3+(aq).
Calculate the mass percent of iron in the original ore sample.
Please round your answer to the tenths place.
Question 7 (2...
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