The DID YOU KNOW thread

[Ryu Kishi]

did you know fiend once got bitten by a cobra and the cobra died

 

[Tenshi Hikari]

Did you know I'm inactive lol

 

[Ripple Hole]

Did you know water is wet

 

[Tenshi Hikari]

Did you know i missed posting here.

 

[fiend]

Did you know Hikari-chan was missed .

 

[Tenshi Hikari]

Did u know I missed you guys too. :th:

 

[Ryu Kishi]

Did you know the human body of a 70 kg person contains
0.2mg of gold

 

[Tenshi Hikari]

Did you know it rained all day.

 

[Ryu Kishi]

Did you know rice is the staple food for 50% of the worlds
population

 

[Natsu Shazneel]

Did you know I never noticed this thread till now?

 

[fiend]

Did you know I'm posting after a few days.

 

[Ryu Kishi]

Did you know Pearls melt in vinegar

 

[fiend]

Did you know Today is Saturday!!!

 

[Tenshi Hikari]

Did you know August is ending. U_U

 

[Natsu Shazneel]

Did you know Sasuke does not suck.

 

[Agent Phrank]

Did you know Pearls melt in vinegar

You must be registered for see images

It doesn't melt in vinegar- rather, it dissolves in the acetic acid (H2C4O2)
Melting is a phase change- a physical process, not chemical.

The calcium carbonate (CaCO3) neutralizes the acetic acid (found in vinegar).

Reaction:
CaCO3(s) + 2 CH3COOH(aq) --> Ca(COOH)(aq) + CO2(g) + H2O (l)

Simply: a weak base reacting with a weak acid.

I've never tried this before but you could probably achieve the same results by placing a pearl in Coca-cola, or any common soda.
The phosphoric acid (relatively stronger than acetic acid) would dissolve it relatively quicker than acetic acid.
The carbonic acid could also facilitate the neutralization.

Reaction:
3 CaCO3 (s) + 2 H3PO4 (aq)<-> Ca3(PO4)2 + 3 H2O(aq) + 3 CO2(g)

/chemistry rant

OT:

You must be registered for see links

 

[Ryu Kishi]

Did you know a hard boiled eggs spin (uncooked or soft boiled
don�t)

 

[Tenshi Hikari]

Did you know mountain dew has higher caffeine content than coke. U_U

 

[Ryu Kishi]

Did you know there is no butter in buttermilk

 

[Jinrou]

You must be registered for see images

It doesn't melt in vinegar- rather, it dissolves in the acetic acid (H2C4O2)
Melting is a phase change- a physical process, not chemical.

The calcium carbonate (CaCO3) neutralizes the acetic acid (found in vinegar).

Reaction:
CaCO3(s) + 2 CH3COOH(aq) --> Ca(COOH)(aq) + CO2(g) + H2O (l)

Simply: a weak base reacting with a weak acid.

I've never tried this before but you could probably achieve the same results by placing a pearl in Coca-cola, or any common soda.
The phosphoric acid (relatively stronger than acetic acid) would dissolve it relatively quicker than acetic acid.
The carbonic acid could also facilitate the neutralization.

Reaction:
3 CaCO3 (s) + 2 H3PO4 (aq)<-> Ca3(PO4)2 + 3 H2O(aq) + 3 CO2(g)

/chemistry rant

OT:

You must be registered for see links

^^ Did you know the image fit correctly with the ensuing post xD