將50 mL 的0.02 M 氯化鈉溶液倒掉25 mL,則剩餘溶液的莫耳濃度變化如何?
3~3酸鹼程度的表示

Quiz
•
Chemistry
•
8th - 9th Grade
•
Medium

CHEN HSI CHUAN
Used 8+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
變大
變小
不變
無法判斷
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列四種溶液的pH值,何者最大?
濃硫酸
檸檬汁
茶
肥皂水
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若將少量的硫酸加入純水中,則加入前後水中氫離子濃度與pH值的變化,下列何者正確?
氫離子濃度變小、pH值變小
氫離子濃度變大、pH值變大
氫離子濃度變大、pH值變小
氫離子濃度變小、pH值變大
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
媽媽在廚房料理紫高麗菜,菜裡流出的汁液最開始呈現紫色,後來因為摻了醋,顏色變紅色,用餐完後使用肥皂水洗盤子時,菜汁又變黃綠色。若加紫色高麗菜汁在下列溶液中,何者呈現紅色?
米酒
糖水
食醋
食鹽水
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
取一無色水溶液。當加入酚酞指示劑時水溶液依舊呈無色,放入大理石則產生氣泡。下列何者最可能為此水溶液中所含的溶質?
氫氧化鈉
氫氧化鈣
氯化氫
氯化鈉
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
試管架上放有裝入甲、乙、丙水溶液的三支試管,若將其水溶液滴在廣用試紙上,所呈現的顏色如右表所示,則哪個溶液可能不會導電?
甲
乙
丙
無法判斷
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
硫酸溶液加水稀釋後,哪一項數值會變小?
pH值
溶劑的量
氫離子濃度
溶質的量
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