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Why does iron filings in copper sulphate solution become colourless from green after sometime?
Copper sulfate solution starts of a blue colour. When Iron metal is added to the solution a REDOX reaction begins in which the copper is reduced (gains electrons) to become copper metal and the iron is oxidised (loses electrons) to become iron ions. When the iron ions go into solution, it will change to a green colour which is the colour of iron (II) sulfate. As a general principle, a more reactive metal will displace a less reactive metal from solution by the process described above.
What colour does a silvery iron metal go when it has rusted?
When iron metal rusts, it develops a reddish-brown color due to the formation of iron oxide on its surface.
Can you burn metals to make metal oxides?
Yes, many of the more reactive metals can be burnt to produce their oxides. Magnesium is a good example of this which burns with a white light to produce MgO. Not all metals need to be burnt. Iron is oxidised by oxygenated water to form Iron oxide (rust) and aluminum is oxidised in air. Less reactive metals however, will need different conditions to be oxidised. The least reactive metals such as platinum and rhodium are very difficult to oxidise.
Is the reddish-brown metal a physical or chemical change?
Neither. Hash Brown refers to a style of cooking potatoes in which the potatoes are shredded raw, flattened into about a 1/2" thickness and then browned on both sides by pan frying either on a griddle or in a frying pan using a small amount of fat. When the potatoes are first peeled and sliced however, they can start to turn brown if exposed to oxygen and not cooked due to enzymatic browning (a chemical reaction). When the hash browns are fried, the exterior will turn brown through a chemical process known as the "Maillard Reaction."
What is the normal phase of magnesium?
magnesium is a solid and normally it may get oxidised to form MgO
What is the color of metal bromine?
Bromine is not a metal, it is a non-metal. Its colour is Reddish brown
What metal is oxidised by ZnCl2 but not MgCl2?
coca3
Why does iron filings in copper sulphate solution become colourless from green after sometime?
Copper sulfate solution starts of a blue colour. When Iron metal is added to the solution a REDOX reaction begins in which the copper is reduced (gains electrons) to become copper metal and the iron is oxidised (loses electrons) to become iron ions. When the iron ions go into solution, it will change to a green colour which is the colour of iron (II) sulfate. As a general principle, a more reactive metal will displace a less reactive metal from solution by the process described above.
What happens to metal when left in the sun?
When metal is left in the sun, it will absorb heat and can become very hot to the touch. Depending on the type of metal, prolonged exposure to sunlight may cause it to expand slightly due to thermal expansion. However, if the metal is painted or coated, the coating may degrade or fade over time due to sun exposure.
Is Rusting of spoon temporary or permanent?
Permanent...once the metal has oxidised -there is no way to reverse it.
What colour does a silvery iron metal go when it has rusted?
When iron metal rusts, it develops a reddish-brown color due to the formation of iron oxide on its surface.
Which non metal is stored under water and why?
Phosphorus to keep oxygen away from it so that it does not get oxidised
How does the formulas of the oxides formed by alkaline earth metals compare with those of lead?
When we look at the electron configuration we can make a comparison betwwen an alkine earth metal and lead oxide. Alkine earth when oxidised will become neutral and form a salt. When lead is oxidised the hydrogen atom is not included and will therefore not form a salt, this will result in the lead oxide not becoming a neutral atom but it will become an ion having a charge of -2
What is the colour of copper metal?
the color of Cu 2 atom is blueans2. Copper metal is an orange-brown colour. Many copper salts are green or blue.We cannot meaningfully talk of the colour of a copper atom.
How metal elements get color?
Gold has a shiny yellow colour and copper has a pinkish colour but it appears brown, due to the reaction with oxygen. Some metals have a blackish colour like lead or iron. Some show bluish cast when exposed to light like osmium. Metal Niobium sometimes appears blue due to reactivity with oxygen. But most of the elements have silvery colour.
Name some metal salts and their colour?
Calcium carbonate is white; coppper (II) hydroxide is blue; iron (III) hydroxide is reddish brown.
How rust affects coral reefs?
Particles of the oxidised metal may build up and form a solid surface over the reef
