婕妤 asked in 科學化學 · 1 decade ago

《物質性質----聰明的大大進來唄》

因為最近自然實驗要做報告.....可是網路上並沒相關資料...

所以就來請教各位大大喔.....

Calucium Carbonate〈Boiling Chip〉和 Wood chips

的密度.外型.和化學符號.......

我不曉得我有沒有拼錯說= .=

我本人現居美國.....

所以都是英文....

請見諒....

希望各位聰明的大大給我解答喔.....

Update:

那木頭他大概密度ㄉ範圍呢.....

3 Answers

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  • 1 decade ago
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    回答你中英文應該都可以吧?

    首先Calucium Carbonate中文叫碳酸鈣,CaCO3

    分子量 100.1 amu

    外觀 白色固體

    密度 2.7 g/cm3

    分解溫度 1172 K (889 ℃) 熱會分解成二氧化碳和氧化鈣

    熔點 1612 K (1339 ℃)

    沸點 1172 K (889 ℃)

    大理石、石灰石、白堊等天燃礦物的主要成分是碳酸鈣。

    (1)物理性質:白色固體,不溶于水。

    (2)化學性質:

    與酸反應産生使石灰水變渾濁的氣體二氧化碳,這是鑒定碳酸根離子的最簡便的方法。

     石灰岩層裏不溶性碳酸鈣和溶有二氧化碳的水作用能轉化成碳酸氫鈣,溶有碳酸氫鈣的水也可析出碳酸鈣,這就是溶洞的形成原因。

    Boiling Chips 是用來防止加熱煮沸溶劑東西噴出來的小石塊,組成是碳酸鈣的發泡顆粒

    http://orgchem.colorado.edu/hndbksupport/dist/boil...

    Boiling chips are small, insoluble, porous stones made of calcium carbonate or silicon carbide. These stones have pores inside which provide cavities both to trap air and to provide spaces where bubbles of solvent vapor can form. When a boiling chip is heated in a solvent, it releases tiny bubbles. These bubbles ensure even boiling and prevent bumping and boiling over and loss of the solution.

    Always use a boiling chip when heating a solvent.

    Never add a boiling chip to a hot solvent, because it can cause immediate boiling over of the solution. If you forget to add a boiling chip before you begin, you must cool the solution before adding one to prevent product loss. Boiling chips cannot be re-used since the pores inside these stones become filled with liquid on cooling.

    Wood chips 字面上看來就是一般木頭片屑,特點是輕薄,表面積大,化學反應速度快,應該不是什麼特別的化學物質

    http://bbq.about.com/od/spicesseasonings/f/f063004...

  • 1 decade ago

    是Calcium Carbonate,沒有u

  • 1 decade ago

    Boiling Chip是Calcium Carbonate。它的密度我並不知。外型嘛,我做 lab也用過啦,它就是White solid... it's not crystal, not powder, just a large solid white substance without any particular shape. 化學符號: CaCO3.

    Wood Chip的話,我一點也不清楚,不好意思哦

    不過我的老師是不會要求 boiling chip 的性質啦…它只是為了不讓溶液滾的太勵害吧…

    所以我覺得,你可以再問問老師是不是真的要這些的properties吧…

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