0
Why is heat needed to cause zinc coating to diffuse into copper?
Wiki User
∙ 12y ago
Heat is needed because if you just placed copper with zinc, you'd just have a zinc coating around the copper. The composition of zinc and the composition of zinc will be separate instead of becoming one solution. The heat allows the two to bond, allowing the zinc and copper to move around, and become an alloy (a solid solution) - brass.
Wiki User
∙ 13y ago
Heat is needed to cause zinc coating to diffuse into copper because it provides the energy required to break the atomic bonds in the zinc and copper surfaces, allowing the zinc atoms to migrate and diffuse into the copper lattice. This process, known as diffusion, occurs more rapidly at higher temperatures due to increased atomic movement and can result in the formation of a brass alloy layer between the zinc coating and copper substrate.
Wiki User
∙ 12y agowhen it is heated, the atoms start to vibrate and some of the zinc and copper "change places" and you get a solution of copper and zinc, which is the alloy brass.
Add your answer:
Earn +20 pts
Would copper melt in acid?
Only if the acid is above the melting point of copper. However, the copper might dissolve in acid if the acid is oxidizing. If it did, copper ions would be present in the solution formed, but there would not be an metallic copper in it.
What are copper supplements used for?
Copper supplements are used to treat or prevent copper deficiency, which can cause anemia, reduced immune function, and other health issues. Copper is important for proper growth and development, as well as for maintaining healthy bones and nerves.
What would cause silver to turn a copper color?
Exposure to sulfur compounds in the environment can cause silver to tarnish, resulting in a copper color. This tarnish forms a layer of silver sulfide on the surface of the silver, altering its appearance. Regular cleaning and proper storage can prevent tarnishing.
What happens when sulphuric acid is poured on a copper plate?
When sulfuric acid is poured on a copper plate, a redox reaction occurs, result in the production of copper sulfate, water, and sulfur dioxide gas. The reaction will also cause the copper plate to corrode, forming a greenish-blue layer of copper sulfate on its surface.
Can copper touch galvanized metal?
When using SMAW ("stick") welding, galvanized steel can be welded in the same manner as uncoated steel. ... The thicker the zinc coating, the more fumes are generated, and those fumes have to be able to escape easily into the atmosphere and not be forced through the liquid weld metal.
Can a mirror cause diffuse reflection?
Yes, a mirror can cause diffuse reflection. If the surface of the mirror is not perfectly smooth or if the incident light is scattered in different directions upon reflection, it can lead to diffuse reflection instead of the usual specular reflection associated with mirrors.
What kind of reflection does a brick wall cause?
Diffuse reflection
What is the cause of coating chromium on a water tap?
Heat
Why does copper change color when heated?
When copper is heated a colored coating is formed. This coating is called "scale", and consists of a thin layer of copper oxide on the surface of the copper. Depending on the thickness of the layer and its temperature, the scale can be some very interesting colors, such as red, blue, brown, and pink, and at higher temperatures, black. The effect is quite noticeable on soldering irons with copper tips.
Does the copper T cause weight gain?
The copper IUD does not have systemic effects and does not cause weight gain.
Nickel is often used in electric wiring because of its superior ability to conduct electricity and its relatively low cost?
false I agree copper can oxidize and cause problems nickel is applied to limit oxidation and usually is a coating not as solid wire.
What is the value of a 2000 gold penny?
One cent. The US doesn't make gold pennies. Your coin has either been plated for use in jewelry, or the copper coating has reacted a bit with the zinc core. The latter can cause a goldish tint
How do you store copper?
Copper can be stored in bottles containing water, such that none of the copper is exposed to air, as this can cause the corrosion of copper.
Metals that can cause blue green stains?
copper and alloys of copper
What is diffuse cerebr?
Diffuse cerebral hypoxia (DCH) is limited to conditions that cause mild to moderate hypoxemia, or low arterial-oxygen content due to deficient blood oxygenation.
What keeps a penny from rusting?
Rust is the name normally given to iron oxide, a compound formed when iron or steel is exposed to oxygen. Pennies, or cents in the US (and Canada until 2012) are made from copper and other non-ferrous metals so by definition they don't form rust. However some countries' "copper" coins are actually made of steel with a thin copper coating. If the coating is damaged oxygen can cause the underlying steel to rust although the copper itself does not.However, copper can and does react with oxygen and other materials over time, but usually it's a much slower process than what happens with a ferrous metal. In the case of coins, the most common reaction produces a greenish patina called verdigris; it's normally copper carbonate but in proximity to seawater verdigris can contain copper chloride.
Could copper also cause zinc ions to precipitate?
No. Ions do not precipitate on their own. Since zinc is more reactive that copper it will replace copper. So placing zinc in a solution of a copper salt will cause elemental copper to precipitate.
