作者botarabbit (我以姓聞為榮)
看板SENIORHIGH
標題[問題] 化學的四個小問題
時間Thu Oct 25 03:53:23 2007
有四個問題...
做到半夜還是做不懂
希望高手可以幫忙解答....
1.Copper metal readily dissolves in dilute aqueous nitric acid to form
blue (Cu2+) and nitric oxide gas.
What has been reduced?
2.How much slaked lime(Ca(OH)2) would be needed to neutralize the acid
in a lake that contains 4.00x10^5 M and has a volume of 2.60 miles
(1.20cubic = 5.00x10^12 L )?
3.What is the PH of a solution prepared by diluting 25.0 mL of 0.874 M HCl
to a volume of 575 mL ?
4.It is considered highly dangerous to splash barefoot in puddles
during a lightning storm. Why?
都是高中內容 只是是英文的
幫解.. 感激不盡
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◆ From: 140.120.224.144
推 osbsd1:1. NO2 10/25 04:36
推 osbsd1:3. PH=1.439 10/25 04:39
→ mapletree:你翻成中文我就幫你 10/25 04:39
→ osbsd1:2和4我英文太差了嗎???? mile不是英里嗎? 怎會是體積 10/25 04:41
推 botarabbit:...第一題錯了... 是N5+........... 10/25 09:39
推 nctuboy:3Cu + 8HNO3 -> 3Cu2+ +6NO3- +2NO +4H2O 就可以看出誰被 10/25 12:52
→ nctuboy:氧化誰被還原了 10/25 12:56
推 lovehan:應該是原PO的普化作業？ = =" 10/25 19:00
推 eeetfj:第一題不知道方程式也可以寫阿 銅被氧化 那硝酸就被還原拉 10/25 19:38
推 eeetfj:第二題如果是2.6L 那就需要 1.4*10^4 g 的 氫氧化鈣 10/25 19:41
→ eeetfj:第三題稀釋後的濃度0.038M pH= 1.42 10/25 19:43
→ eeetfj:第四題看不懂==..== 10/25 19:45