5 3. In this experiment, reactions 1,andare of the same classification. What typ

Question

5 3. In this experiment, reactions 1,andare of the same classification. What type of reaction do they represent? Explain your choice by writing one of the reaction equations and identifying the reactants according to their behavior. 4. Show by calculation that the 2.0 g of zinc used in reaction is enough to completely react with the mass of copper that you started with. 5. The Statue of Liberty is made of bronze, but exhibits a green surface, or "patina". What is bronze? Based on the composition of bronze, suggest a chemical reason for the green colo and write a chemical reaction to illustrate.

Explanation / Answer

Bronze is an alloy of copper metal with 88 percet copper and 12 percent tin.

as copper is major component in bronze , when it recats with air in atmosphere ,it forms greenish dull coloured copper oxides and further reacts with CO2 and forms carbonates.the reactions involved are

2Cu+ O2---. 2CuO

CuO+ CO2---> CuCO3

oxidation of copper and formation of copper oxides makes the statueof liberty green as these oxides and carbonates forms green layer due to copper corrision.

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