When you burned copper the product copper oxide appeared on the wire Besides copper the other reactant is explain how you know it must be oxygen Where did the oxygen come from?
When you burned copper the product copper oxide appeared on the wire Besides copper the other reactant is explain how you know it must be oxygen Where did the oxygen come from?
Copper oxide is the only product, and it contains copper and oxygen. One of the reactants is copper, so the other reactant must be oxygen. The copper metal must have combined with something in the air.
What type of reaction is the production of copper oxide and water from copper hydroxide?
This reaction is a decomposition reaction. STEP #4 – Dissolution of Copper (II) Oxide: Copper (II) oxide dissolves readily in aqueous hydrochloric acid, HCl, to form a turquoise colored solution as the result of the formation of the water soluble salt, copper (II) chloride.
Which of the following best explains why you sanded the copper wire before burning it to create less friction between the copper and the tongs to make sure that copper metal was exposed on the surface of the wire to make the copper wire flammable to weaken the copper wire so it would be more?
So, when we sanded copper wire then these impurities get removed and copper metal gets exposed onto the surface. Thus, we can conclude that you sanded the copper wire before burning it to make sure that copper metal was exposed on the surface of the wire.
What makes copper suitable for use in electrical wiring?
Why is copper used for most electrical wiring? The lower the level of resistivity, the more electrical conductivity a metal has. Copper has low resistivity, and therefore is an excellent conductor. Copper is also less oxidative than other metals.
What metals could be used to reduce copper ions to copper metal?
The metals that would be able to reduce copper ions in solution would be hydrogen(H), lead(Pb), tin(Sb), nickel(Ni), iron(Fe), zinc(Zn), aluminum(Al), Magnesium(Mg), sodium(Na), calcium(Ca), potassium(K), and lithium(Li). 5.
What other metals could be used to reduce copper ions to copper metal?
For example, nickel metal is capable of reducing copper(II) ions, but is not capable of reducing zinc ions. This is because nickel (Ni) is below Cu 2+ , but is above Zn 2+ in the table.
What type of reaction is sodium phosphate plus copper II nitrate?
Gas-forming reactions occur when one of the products is a gas that bubbles out of solution. A solution of sodium phosphate reacts with a copper(II) chloride solution according to Equation 2. The reaction may be classi- fied as a double replacement, precipitation reaction.
What forms a blue precipitate with na2s?
Colorless sodium sulfide solution is added to blue copper(II) nitrate solution. If a precipitate forms, the resulting precipitate is suspended in the mixture. …
What produces a blue precipitate with NaOH?
Solutions containing copper(II) ions form a blue precipitate when mixed with sodium hydroxide solution.
What forms a brown precipitate with NaOH?
A brownish-red precipitate will be formed if iron(III) (Fe+3) reacts with sodium hydroxide.
What color is fe2+?
Identifying transition metal ions
| Metal ion | Colour |
|---|---|
| Iron(II), Fe 2 + | Green – turns orange-brown when left standing |
| Iron(III), Fe 3 + | Orange-brown |
| Copper(II), Cu 2 + | Blue |
What reaction forms a brown precipitate?
Brown precipitate formed when added with sodium hydroxide or ammonia solution. Adding sodium hydroxide to a solution containing iron(II) ions (Fe+2) will produce a green precipitate. A brownish-red precipitate will be formed if iron(III) (Fe+3) reacts with sodium hydroxide.
What is the test for carbonates?
Testing for carbonate ions Carbon dioxide gas bubbles if carbonate ions are present. Limewater is used to confirm that the gas is carbon dioxide. It turns from clear to milky when carbon dioxide is bubbled through.
What is a blue precipitate?
Solutions containing copper(II) ions form a blue precipitate when mixed with sodium hydroxide solution. Solutions containing copper(II) ions form a blue precipitate when mixed with sodium hydroxide solution.
How do you test for sodium carbonate?
Compare the color of the pH paper with the pH scale typically printed on the pH paper pack and assign pH of the solution accordingly. If pH is around 8, the sample is sodium bicarbonate. If pH is in the range 9.5 to 10, it is sodium carbonate.
What is the liquid that can be used to test for carbon dioxide?
Limewater
How can you tell the difference between carbonate and bicarbonate?
One important chemical test to differentiate carbonate and bicarbonate is MgSO4 test. When carbonate salt is reacted with MgSO4, a white salt precipited while bicarbonate salt on reacting with MgSO4, not only a white salt precipited but also a brisk effervescence occur.