In detail, how would you explain the following observations? a. Zinc metal spontaneously reacts with aqueous...

In detail, how would you explain the following observations? a. Zinc metal spontaneously reacts with aqueous acid to evolve hydrogen gas, but amalgamated Zn reacts extremely slowly. b. Touching a copper wire to amalgamated Zn leads to production of bubbles of hydrogen all along the copper wire. c. Bubble formation shifts to a Pt wire that contacts the copper wire in 5b.

Expert Solution

queen_honey_blossom answered 2 years ago

. Consider this reaction: zinc metal reacts with hydrochloric acid to produce hydrogen and zinc chloride....

. Consider this reaction: zinc metal reacts with hydrochloric acid to produce hydrogen and zinc chloride. Zn + 2 HCl → ZnCl2 + H2 (a) If 0.30 mol of Zn is added to hydrochloric acid containing 0.52 mol of HCl, how many moles of H2 are produced? (or what is the theoretical yield of H2 produced in the reaction?) (b) In the above procedure, if the actual yield of the reaction is 0.26 mol of H2. What is the percent...

11. Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn (s) +...

11. Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn (s) + 2 HCl (aq)  ZnCl2 (aq) + H2 (g) When 0.103 g of Zn (s) is combined with enough HCl to make 50.00 mL of solution in a coffee cup calorimeter, all of the zinc reacts raising the temperature of the solution from 22.50 oC to 23.70 oC. Calculate Hrxn in kJ/mol of Zn. (Assume that density of the solution = 1.00 g/mL and...

Zinc (Zn) metal reacts with hydrochloric acid (HCl) according to the following reaction: Zn(s) + 2...

Zinc (Zn) metal reacts with hydrochloric acid (HCl) according to the following reaction: Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g)What volume of H2 gas would be collected over water if 6.93 g Zn metal were allowed to react with 25.0 mL of 1.0 M HCl at 25.0 oC? The vapour pressure of water at 25.0 oC is 23.8 torr, and the pressure of the laboratory is 1.00 atm

1. A piece of zinc metal is added to an acidic, yellow aqueous solution of vanadate...

1. A piece of zinc metal is added to an acidic, yellow aqueous solution of vanadate ion, dioxidovanadate(V), [VO2]+. The solution turns blue due to formation of vanadyl ion, oxidovanadate(IV), [VO]2+. Write a balanced equation for the oxidation half-reaction. (2 points) Write a balanced equation for the reduction half-reaction. (2 points)

Zinc and magnesium metal each reacts with hydrochloric acid to make chloride salts of the respective...

Zinc and magnesium metal each reacts with hydrochloric acid to make chloride salts of the respective metals, and hydrogen gas. A 12.50-g mixture of zinc and magnesium produces 0.6754 g of hydrogen gas upon being mixed with an excess of hydrochloric acid. Determine the percent magnesium by mass in the original mixture.

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Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) How many...

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) How many liters of H2 would be formed at 636 mm Hg and 17 ∘C if 27.0 g of zinc was allowed to react? How many grams of zinc would you start with if you wanted to prepare 6.85 L of H2 at 284 mm Hg and 28.5 ∘C?

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl : Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) 1)How...

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl : Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) 1)How many liters of H2 would be formed at 592 mm Hg and 17 ∘C if 25.5 g of zinc was allowed to react? 2)How many grams of zinc would you start with if you wanted to prepare 4.60 L of H2 at 294 mm Hg and 34.5 ∘C ?

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.107 g...

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.107 g of Zn(s) is combined with enough HCl to make 54.9 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 22.0 ∘C to 24.0 ∘C. Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g⋅∘C as the specific heat capacity.)

Zinc, a divalent metal, was measured to have a positive Hall coefficient. Explain the reason (theory)...

Zinc, a divalent metal, was measured to have a positive Hall coefficient. Explain the reason (theory) behind this fact.

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