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元素化合物方程式書(shū)寫(xiě)(一)鋁及其化合物

2021-10-29 20:47 作者:冷雨淅  | 我要投稿

一、請(qǐng)寫(xiě)出%5Cce%7BAl(OH)_3%7D的電離方程式(其中酸式電離產(chǎn)生正四面體微粒)

%5Cmathrm%7BAl(OH)_3%20%2B%20H_2O%20%5Crightleftharpoons%20%20%5BAl(OH)_4%5D%5E-%20%2B%20H%5E%2B%20%5C%5C%0AAl(OH)_3%20%5Crightleftharpoons%20Al%5E%7B3%2B%7D%20%2B%203OH%5E-%7D

二、%5Cmathrm%7BAl_%7B3%2B%7D%E3%80%81Al(OH)_3%E3%80%81AlO_2%5E%2B%7D之間的轉(zhuǎn)化關(guān)系


轉(zhuǎn)化關(guān)系

寫(xiě)出實(shí)現(xiàn)上述各步轉(zhuǎn)化的離子方程式。

(1) ①%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%203NH_3%20%5Ccdot%20H_2O%20%3D%20Al(OH)_3%20%5Cdownarrow%20%2B%203NH_4%5E%2B%7D

? ? ?②%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%203AlO_2%5E-%20%2B%206H_2O%3D%204Al(OH)_3%5Cdownarrow%20%7D

? ? ?③%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%203OH%5E-%20%3D%20Al(OH)_3%5Cdownarrow%20%7D

(2)%5Cmathrm%7BAl(OH)_3%20%2B%203H%5E%2B%20%3D%20Al%5E%7B3%2B%7D%20%2B%203H_2O%7D

(3)%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%204OH%5E-%20%3D%20AlO_2%5E-%20%2B%202H_2O%7D

(4)%5Cmathrm%7BAlO_2%5E-%20%2B%204H%5E%2B%20%3D%20Al%5E%7B3%2B%7D%20%2B%202H_2O%7D

(5) ①%5Cmathrm%7BAlO_2%5E-%20%2B%20CO_2%20%2B%202H_2O%3D%20Al(OH)_3%20%5Cdownarrow%20%2B%20HCO_3%5E-%7D

? ? ??②%5Cmathrm%7BAlO_2%5E-%20%2B%20H%5E%2B%20%2B%20H_2O%20%3D%20Al(OH)_3%20%5Cdownarrow%7D

三、按要求書(shū)寫(xiě)離子方程式

1.%5Cmathrm%7BAl%7D%5Cmathrm%7BNaOH%7D溶液反應(yīng)

%5Cmathrm%7B2Al%20%2B%202OH%5E-%20%2B%202H_2O%20%3D%202AlO_2%5E-%20%2B%203H_2%20%5Cuparrow%7D

2.%5Cmathrm%7BAl_2O_3%7D%5Cmathrm%7BNaOH%7D溶液反應(yīng)

%5Cmathrm%7BAl_2O_3%20%2B%202OH%5E-%20%3D%202AlO_2%5E-%20%2B%20H_2O%7D

3.向%5Cmathrm%7BNH_4Al(SO_4)_2%7D溶液中滴加%5Cmathrm%7BNaOH%7D溶液。

①少量%5Cmathrm%7BNaOH%7D溶液

%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%203OH%5E-%20%3D%20Al(OH)_3%20%5Cdownarrow%7D

%5Cmathrm%7BNH_4Al(SO_4)_2%7D和\\%5Cmathrm%7BNaOH%7D以物質(zhì)的量之比1∶4混合

%5Cmathrm%7BNH_4%5E%2B%20%2B%20Al%5E%7B3%2B%7D%20%2B%204OH%5E-%20%3D%20NH_3%20%5Cuparrow%20%2B%20Al(OH)_3%20%5Cdownarrow%20%2B%20H_2O%7D

③過(guò)量%5Cmathrm%7BNaOH%7D溶液

%5Cmathrm%7BNH_4%5E%2B%20%2B%20Al%5E%7B3%2B%7D%20%2B%205OH%5E-%20%3D%20NH_3%20%5Cuparrow%20%2B%20AlO_2%5E-%20%2B%203H_2O%7D

4.明礬溶液與%5Cmathrm%7BBa(OH)_2%7D溶液反應(yīng)的離子方程式

%5Cmathrm%7BAl%5E%7B3%2B%7D%7D恰好完全沉淀

%5Cmathrm%7B2Al%5E%7B3%2B%7D%20%2B%206OH%5E-%20%2B%203Ba%5E%7B2%2B%7D%20%2B%203SO_4%5E%7B2-%7D%20%3D%202Al(OH)_3%20%5Cdownarrow%20%2B%203BaSO_4%5E%7B2-%7D%20%5Cdownarrow%7D

%5Cmathrm%7BSO_4%5E%7B2-%7D%7D恰好完全沉淀

%5Cmathrm%7BAl%5E%7B3%2B%7D%20%2B%204OH%5E-%20%2B%20Ba%5E%7B2%2B%7D%20%2B%20SO_4%5E%7B2-%7D%20%3D%20AlO_2%5E-%20%2B%20BaSO_4%5E%7B2-%7D%20%5Cdownarrow%20%2B%202H_2O%7D

5.請(qǐng)比較%5Cmathrm%7BAlO_2%5E-%7D%5Cmathrm%7BCO_3%5E%7B2-%7D%7D得質(zhì)子能力:%5Cmathrm%7BAlO_2%5E-%20%3E%20CO_3%5E%7B2-%7D%7D

?請(qǐng)用一個(gè)離子方程式說(shuō)明:%5Cmathrm%7BAlO_2%5E-%20%2B%20HCO_3%5E%7B2-%7D%20%2B%20H_2O%20%3D%20Al(OH)_3%20%5Cdownarrow%20%2B%20CO_3%5E%7B2-%7D%7D%24


元素化合物方程式書(shū)寫(xiě)(一)鋁及其化合物的評(píng)論 (共 條)

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