有兩條問題關於Conc. sulphuric acid

上邊果位唔該唔好誤導人

[下列是用來糾正上邊人兄用的]
Conc. sulphuric acid
通常 1M + 先叫做 conc. sulphuric acid
pH 通常都差唔多 1 or even <1
假如用 pH= -log [H+] 計算
[H+] = 0.1 moldm^-3
你話個 conc 高唔高 ?! (水係 25 度係 1.0 X 10^-7 moldm^-3)

+ 真正答案 +
其實果位人兄錯唔哂 ~
corrosive 係因為 conc. sulphuric acid high affinity to water 的緣故
(所以 conc. sulphuric acid 係 strong dehydrating agent)
不過詳細原因我唔記得佐 = ="

檸檬汁既[H+]都好高但不會腐蝕皮膚

好明顯腐蝕性不並是由[H+]去決定, 是與物質化學性質有關

for concentrated sodium hydroxide solution, it is very corrosive, but the concentration

of hydrogen ion is very low! Therefore, the corrosive nature of a substance does not

depend on the concentration of hydrogen ion.

the answer is C. it removes water from skin.