chemistry

Woiuld you expect jewelry made from an alloy of silver and copper to tarnish (oxidize) in a laboratory where fumes of bromine are present?

I think that it wouldn't because the bromine fumes are probably not ions, and even if they were they would not react because they are less easily reduced than silver and copper. But I'm not sure, so thanks for anyone's help.

  1. 👍
  2. 👎
  3. 👁
  1. I would expect them to tarnish. While it is true that Br2 fumes are not ionic (you are correct about that) they will tarnish because of another fact; i.e., both CuS and Ag2S are VERY insoluble (they are solid precipitates) so the driving force from the formation of CuS or Ag2S is very strong. I also realize this is not in solution but we are talking about a very think layer of Ag2Br or CuS and that thin layer is the "tarnish."

    1. 👍
    2. 👎
  2. I'm probably too late but DrBob probably didn't give you the right answer. Both silver and copper reduce bromine, so that means that bromine oxidizes both these metals. The oxidation of the silver and copper would cause the jewelry to tarnish.

    1. 👍
    2. 👎
  3. On a table of oxidation and reduction, Bromine is the oxidizing agent and is higher on the table than both Copper and Silver. According to the spontaneity rule (if Oxidizing Agent is higher than the reducing agent there is a reaction) this would mean that the bromine would in fact tarnish (oxidize) the jewellery.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    An alloy is composed of nickel, zinc, and copper in a ratio of 3:4:13. How many kilograms of each metal are needed to make 4 kg of this alloy?

  2. Math

    If an alloy requires copper, nickel, and zinc in a ratio of 12:5:3, how many kilograms of each metal are needed to make 5 kg of the alloy?

  3. Chemistry

    When copper wire is placed into a silver nitrate solution, silver crystals and copper(II) nitrate solution form. Write the balanced chemical equation for the reaction. (Type your answer using the format CH4 for CH4.) 1 Cu(s) +

  4. chemistry

    Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and

  1. chemistry

    A piece of copper alloy with a mass of 77.0 g is heated from 34.0◦C to 50.0◦C. In the process, it absorbs 593 J of energy as heat. What is the specific heat of this copper alloy? Answer in units of J/g · K. How much energy

  2. math

    An alloy of copper is 10% copper and weighs 25 pounds. A second alloy is 18% copper. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 13% mixture.

  3. math

    an alloy is formed by mixing 4.5g copper and 2.8g zinc.how much alloy of similar kind can be formed by using 13.5g copper?

  4. math

    Anne and Nancy use a metal alloy that is 23.5% copper to make jewelry. How many ounces of a 21% alloy must be mixed with a 30% alloy to form 108 ounces of the desired alloy?

  1. chemistry

    Silver tarnishes (turns to Ag2S) in the presence of oxygen and hydrogen sulfide according to the following equation: 4Ag(s) + 2H2S(g) + O2(g) ¨ 2Ag2S(s) + 2H2O(l) Usually, H2S is the limiting reactant. If a silver spoon is

  2. Chemistry

    A spoon of sterling silver is 92.5% silver by mass and the rest is made of other metals, usually copper. If the spoon contains 0.557 mol of silver, what is the mass of the spoon?

  3. math

    German Silver is an alloy composed of nickel, zinc, and copper in a ratio of 3:4:13. How many kilograms of each metal are needed to make 4 kg of this alloy?

  4. science

    Consider a piece of gold jewelry that weighs 9.35 g and has a volume of 0.690 cm3 . The jewelry contains only gold and silver, which have densities of 19.3 g/cm3 and 10.5 g/cm3, respectively. If the total volume of the jewelry is

You can view more similar questions or ask a new question.