https://padlet.com/7114150314/2l210vvpl6pn 8-) en-us 2017-10-27 10:57:27 UTC 2025-10-08 19:13:35 UTC hello@padlet.com https://padlet.com/7114150314/2l210vvpl6pn/wish/201240546 See: The blue solution turned black and made a huge hole on the aluminium cupcake tray, causing the solution to end up in the wine glass. There were bubbles formed
Think: The aluminium cupcake tray got corroded due to the presence of the blue solution.
Wonder: Why does the blue solution turn black?

Explanation
blue solution: copper (II) chloride
2Al (s) + 3CuCl2 --> 2AlCl3 (aq) + 3Cu (s)
Aluminium is of a higher reactivity than copper and hence displaces the copper ions to form aluminium chloride (as seen from the equation above).]]> 2017-10-27 15:21:09 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/201240546 https://padlet.com/7114150314/2l210vvpl6pn/wish/201468163 See: The blue solution turned black and caused a hole to be formed in the aluminium tray,  effervescence was observed and the black solution then flowed into the wine glass. 
Think: A reaction occured and the aluminium tray was corroded.
Wonder: What reacted with the blue solution that caused the aluminium tray to corrode. 

Explanation 
Copper (II) chloride reacted with the aluminium tray and a displacement reaction occured. As aluminium is the more reactive metal it displaced copper (II) ions from its compound and formed copper metal and aluminium chloride. ]]> 2017-10-29 08:35:08 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/201468163 https://padlet.com/7114150314/2l210vvpl6pn/wish/201622299 See: The blue solution turned black, effervescence occurred and made a hole in the aluminium cupcake tray when poured onto the tray. 
Think: a reaction happened when the blue solution came into contact with the aluminium cupcake tray
Wonder: What is the reaction that caused what happened?

Explanation:
The blue solution is copper(II) nitrate.
As aluminium is more reactive than copper, it displaces the copper ions in the aqueous copper(II) nitrate to form aluminium nitrate solution and copper metal.]]> 2017-10-30 08:29:15 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/201622299 https://padlet.com/7114150314/2l210vvpl6pn/wish/202397069 See: When the blue solution was poured onto the tray, effervescence was observed and the solution turned black. A hole was created on the base of the tray, causing the solution to flow into the wine glass.
Think: The blue solution reacted with the aluminium.
Wonder: What is the blue solution? What reaction occured?

Explanation:
The blue solution is Copper(II) Chloride. Since aluminium is more reactive than copper, it displaced the copper ions and aluminium chloride was formed, along with copper metal.]]> 2017-11-01 07:17:54 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202397069 https://padlet.com/7114150314/2l210vvpl6pn/wish/202419692 See]]> 2017-11-01 09:39:04 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202419692 https://padlet.com/7114150314/2l210vvpl6pn/wish/202419698 See: ]]> 2017-11-01 09:39:06 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202419698 https://padlet.com/7114150314/2l210vvpl6pn/wish/202419725 See: the blue liquid reacted with the ]]> 2017-11-01 09:39:16 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202419725 https://padlet.com/7114150314/2l210vvpl6pn/wish/202419732 See: the blue liquid reacted with the a]]> 2017-11-01 09:39:18 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202419732 https://padlet.com/7114150314/2l210vvpl6pn/wish/202419773 See: the blue liquid reacted with the aluminium cupcake tray, effervescence was observe for roughly 3 seconds before a hole was created in the tray causing the liquid to flow into the glass beneath the tray, it turned a]]> 2017-11-01 09:39:35 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202419773 https://padlet.com/7114150314/2l210vvpl6pn/wish/202436243 Identity of blue solution:  copper (II) nitrate

Since aluminium is more reactive than copper, it would react with the copper (II) nitrate and displace the copper to form aluminium nitrate]]> 2017-11-01 11:09:30 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202436243 https://padlet.com/7114150314/2l210vvpl6pn/wish/202438325 See:
The blue solution started bubbling and a big hole was created in the aluminium tray. Black solution, which entered the glass through the hole, was observed.

Think:
The blue solution reacted with the aluminium.

Wonder:
Why was a hole created?

Identity of solution: Copper(II) Chloride
Explanation:
Aluminium displaced the Copper ions in the Copper(II) Chloride to form Aluminium Chloride and Copper metal. This is because Aluminium is more reactive than Copper.
2Al(s) + 3CuCl2 --> 2AlCl3(aq) + 3Cu(s)
Thus, the black solution was alumnium chloride.


]]> 2017-11-01 11:20:52 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/202438325 https://padlet.com/7114150314/2l210vvpl6pn/wish/203527059 See:
blue solution being poured onto the aluminium cupcake tray. a while later, it turned black and there was a hole in the aluminum cupcake tray, which caused the solution to flow downwards into the cup

think:
- I think that the blue solution react ed with the aluminium cupcake tray, which caused the hole in the tray to be formed

wonder:
- what kind of reaction is this?
- why did the hole form?
- what were the reactants and products in this reaction?]]> 2017-11-04 12:31:43 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/203527059 7114150322 https://padlet.com/7114150314/2l210vvpl6pn/wish/203590989 See: blue solution poured into aluminium cupcake tray started bubbling (eFFeRvEsceNcE) and created a big hole in the base of the cupcake tray, resulting in the solution to flow down the hole and into the wine glass 

Think: blue solution reACtEd with the aluminium in the cupcake tray

Wonder: what solution is this? what solutions would aluminium react with

Explanation: the blue solution is copper (II) chloride. A displacement reaction occurred in which aluminium displaced copper ions in the copper (II) chloride solution because it is more reactive than copper, resulting in copper metal and aluminium chloride solution. ]]> 2017-11-05 05:43:37 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/203590989 https://padlet.com/7114150314/2l210vvpl6pn/wish/205127421 See-Think-Wonder
See: Blue solution poured on aluminium cupcake tray immediately begins to bubble and turn black. Within a few seconds, a big hole is burnt through the bottom of the tray. Water vapour condenses on inner surface of glass below.

Think: A reaction has occured between the solution and aluminium. There is a lot of heat produced.

Wonder: What properties of the blue solution and aluminium cause them to react in such a way? Why doesn't the glass get burned through too?
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Explanation
Blue solution is copper (II) chloride. As aluminium is higher than copper on the reactivity series, aluminium is more reactive than copper and displaces copper to form copper + aluminium chloride. 

]]> 2017-11-09 03:56:39 UTC https://padlet.com/7114150314/2l210vvpl6pn/wish/205127421