在純水中加入哪一種物質後,可使酚酞指示劑呈紅色反應?
酸鹼指示劑

Quiz
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Science
•
7th - 9th Grade
•
Medium
鄭之偉 鄭之偉
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
醋酸
食鹽
氫氧化鈉
汽水
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不能用以檢驗物質的酸鹼性?
廣用試紙
石蕊試劑
氯化亞鈷試紙
pH計
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在25℃時將 CaO固體(鹼性物質)加入水中,形成飽和水溶液。有關此水溶液的敘述,下列何者正確?
此水溶液pH值小於7
此水溶液可用來檢驗氧氣
此水溶液加入酚酞試劑呈紅色
加稀鹽酸於此水溶液產生氣泡
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小杰以廣用試紙測試四種溶液的酸鹼度,則下列四種溶液中,何者可以使廣用試紙呈現黃色?
石灰水
氨水
氫氧化鈉水溶液
稀鹽酸
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以廣用試紙測試甲、乙、丙、丁四種溶液的酸鹼性,結果如附表,則哪一溶液的鹼性最強?
甲
乙
丙
丁
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以廣用試紙測試不同水溶液的pH值,會呈現不同顏色,當溶液pH值從1漸漸增加到14時,其顏色的變化為何?
紅→橙→黃→綠→藍→紫
紫→藍→綠→黃→橙→紅
紅→紫→綠→黃→無
無→黃→綠→紫→紅
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有A、B、C三杯不明水溶液,A杯使藍色石蕊試紙呈紅色,B杯使酚酞呈紅色,C杯使廣用試紙呈綠色,請問三杯水溶液的酸鹼性為何?
A為酸性,B為中性,C為鹼性
A為酸性,B為鹼性,C為中性
A為鹼性,B為中性,C為酸性
A為鹼性,B為酸性,C為中性
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