
環境化學111
Authored by Karen Chuang
Chemistry
University
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列常用指示劑適用之pH範圍,何者有誤?
甲基橙(3.1~4.4)
(B)酚紅(4.2~6.2)
(C)石蕊(4.5~8.3)
(D)茜素黃(10.2~12)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關純水之敘述,下列何者有誤?
水分子間有氫鍵存在
25 ℃時,[H+]=10-7 M
常壓時,4 ℃水的密度最大
水的沸點100 ℃,與大氣壓力無關
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
水的硬度常以每百萬單位水中含有多少單位碳酸鈣表示,若總硬度為350 ppm的水,其1000 g中相當於含有多少克之CaCO3?
0.0035
0.035
0.35
3.5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列構成天然水鹼度之主要成分,何者有誤?
OH-
CO32-
H3O+
HCO3-
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
某天測得空氣中之二氧化硫(SO2)平均濃度為30 ppb,假設溫度為25 ℃,空氣分子量為29,該SO2在大氣中所占之莫耳分率為何?
1.36×10-8
1.36×10-7
1.36×10-6
1.36×10-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某溶液中含有0.01 M MgCl2及0.02 M Na2SO4,下列離子及其活性係數(γ)和活性(γC)之組合,何者正確 (註:γ和γC分別計算至小數點後第2位和第3位,以下四捨五入)?
Na+(0.35, 0.031)
Cl-(0.77, 0.015)
Mg2+(0.35, 0.007)
SO42-(0.77, 0.004)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者非屬影響三鹵甲烷生成之控制因子?
pH
溫度
總硬度
有機前質
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