Back to School

Today, I found myself sitting in SMA Negeri 2 Bandung's chair, listening intently to long explanation about alkali metal salts and hydrocarbon. This felt weird, of course. I have been stated to be an alumni since a month ago, but somehow I got the honor to get a private lesson in chemical lab. 2 hours passed like few minutes that way... I thought such situation was improbable, hahahah ^^;

Before anyone can ask, here are what just happened:
In the morning, I canceled watching movie with my friends due upcoming test on 16th. You expect me to study at home, don't you? Well I did my best but failed miserably. The problems I tried to solve were really hard and no one at home can help (not even the internet!)... I felt reaaally frustrated... "Canceled to hang out with friends for nothing? I wouldn't let that happen!"...So there, I went back to school without making any appointment. It was miracle; a teacher offered help in busy day like that. THANK YOU! She even lend me this book...

What I learned today (read for your own risk :p)
> acetylene and propene (propylene) have triple bond, not double! (doh)
> solid NaCl doesn't conduct electricity because solid alkali metal, Al and Mn salts don't form ion...
That's why in electrolysis, water get reduced instead of the metal.
> Basic substances are most likely to form precipitate.
On the other hand, acid substances are easily soluble.
> Zn has full electron in d, so it is more harder to get reacted.
For the same reason, its oxidation number is only 2+.
The 10 electrons won't budge no matter what =_=
Zn don't react with NH_3, but react with KOH. Al react with both, form a precipitate, then the precipitate would dissolves when excess basic substance is added.
> ethyl acetate IS ester but hardly soluble in water.
It has weak bond between the C₂H₅ and O.
> saturated fat has no double bond. To get saturated fat, react fatty acid component with H₂. A double bond will be dissolved by (1) H₂.
> About the precipitate color...
it would be hard to memorize it without doing experiments.
Most precipitates (basic substances and salts) are white.
List of the exceptional:
Fe(OH)₃: brown (it is a rust, geez...)
FeS: black
Fe(CN): yellow
FeCl₃: light yellow
CuSO₄: blue
NiSO₄: green
KMnO₄: orange
PbI₂: yellow
components:
I: yellow
Ba: green
CN: orange
Cr: orange
[edit: scribd(dot)com/doc/36896579/Cation]

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Alright, I'm done with chemistry in this post. Hurraaay!
To make this post lighten, I will announce something (not so) important.
My brother and I are working on comic strips about our daily life. It will be updated weekly. If you are interested you can check it out riiiight here.
He does the writing and I do the drawing (*gasp* I'm selling my soul to the devil!). It's quite a work but I hope it can amuse you :3