The use of ammonium sulphate as a fertilizer adds acidity to the soil.If the soil is too acidic ,it is not suitable for plant growth.Suggest ONE substance that is commonly used by farmers to reduce soil acidity.Explain your answer.
幫幫忙吖~我唔識做呀-___-
真係唔該晒呀~萬分感激!!!!
F.4 CHEM
2008-03-02 6:15 am
回答 (2)
2008-03-06 6:44 am
✔ 最佳答案
其實尼個問題o係香港會考有個標準answer架~
並唔係Calcium carbonate,
而係Ca(OH)2,Calcium hydroxide,又叫做slaked lime
尼個真係d農夫而家常用既anti-acid (姐係用黎neutralize acid既野),
佢係一隻微溶於水既alkali,
當佢遇到acidic既野就會neutralize喇~
Ca(OH)2 + 2H+ → Ca2+ + 2H2O
咁條題目應該可以咁答:
Slaked lime(Calcium hydroxide).
It is an alkali which is slightly soluble in water and gives out hydroxide ions. It can neutralize the acid in soil. Hence, it can be used for this purpose.
2008-03-05 22:47:15 補充：
一號答o個個CaCO3 其實唔係好岩,
因為Calcium carbonate CaCO3 係insoluble in water既,
所以佢唔會溶落泥土,咁就好難好難neutralize到泥土入面d acid~
2008-03-06 23:08:06 補充：
對~怎會是calcium carbonate-0-
參考: 自己(今年會考生) =)
2008-03-02 6:21 am
Use calcium carbonate.
CaCO3 2H --> Ca2 CO2 H2O
calcium is alkaline in nature and neutralizes the acidity of hydrogen ions in the soil.
Hope this can help you.
CaCO3 2H --> Ca2 CO2 H2O
calcium is alkaline in nature and neutralizes the acidity of hydrogen ions in the soil.
Hope this can help you.
收錄日期: 2021-04-23 19:51:03
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