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Ch.4 - Chemical Quantities & Aqueous Reactions

Chapter 4, Problem 119a

Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Identify the oxidizing agent and the reducing agent in this reaction.

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Hi everyone store asked to identify the reducing agent. An oxidizing agent. The reaction of gold medal with iodine In studying chloride producing study in touch with your right and sodium iodide, we're gonna have a U. For gold plus I two plus N A C L. And it's gonna yield in a AUCL. four plus in A. I. And recall that the loss of electrons gonna be oxidation which is going to be our reducing agent in the game of electrons. It's gonna be reduction. Which is gonna be oxidizing agent. And for the changes in oxidation states, we're gonna look at gold Over here, it's zero And then over here clearly is gonna have a negative one. Siding is going to have a plus one. So we got negative four Plus one over here. This has to be a Plus three. So gold has lost electrons. It's going to be a reducing agent. And for iodine Over zero over here I have a plus one over here and a -1 over here. So this gained electrons, it's gonna be an oxidizing agent. And for corinne We're gonna have a negative one here. Plus one here. So it's gonna be negative one And the -1. So there's no change in facility in. We have a plus one here and plus one over here as well. So this is no change to our reducing agent, it's going to be gold. And our oxidizing agent is iodine. Thanks for watching my video and I hope it was helpful
Related Practice
Textbook Question

A solution contains Cr3+ ions and Mg2+ ions. The addition of 1.00 L of 1.51 M NaF solution causes the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 49.6 g. Find the mass of Cr3+ in the original solution.

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The nitrogen in sodium nitrate and in ammonium sulfate is available to plants as fertilizer. Which is the more economical source of nitrogen, a fertilizer containing 30.0% sodium nitrate by weight and costing $9.00 per 100 lb or one containing 20.0% ammonium sulfate by weight and costing $8.10 per 100 lb?

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Textbook Question
Find the volume of 0.110 M hydrochloric acid necessary to react completely with 1.52 g Al(OH)3.
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Textbook Question

Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.5-g mixture of equal masses of all three reactants is prepared.

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Textbook Question

A solution contains one or more of the following ions: Ag+ , Ca2+ , and Cu2+ . When you add sodium chloride to the solution, no precipitate forms. When you add sodium sulfate to the solution, a white precipitate forms. You filter off the precipitate and add sodium carbonate to the remaining solution, producing another precipitate. Write net ionic equations for the formation of each of the precipitates observed.

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Textbook Question

A solution contains one or more of the following ions: Hg22+ , Ba2+ , and Fe2+ . When you add potassium chloride to the solution, a precipitate forms. The precipitate is filtered off, and you add potassium sulfate to the remaining solution, producing no precipitate. When you add potassium carbonate to the remaining solution, a precipitate forms. Which ions were present in the original solution?

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